FNUS55 KCYS 182108 FWFCYS Fire Weather Planning Forecast for Southeast Wyoming/Western Nebraska National Weather Service CHEYENNE WY 308 PM MDT Mon May 18 2026 ...WINTER STORM WARNINGS AND ADVISORIES IN EFFECT FOR SOUTHEAST WYOMING WEST OF INTERSTATE 25 UNTIL 6 PM TONIGHT... ...FREEZE WARNINGS IN EFFECT FOR SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE TONIGHT... .DISCUSSION...No fire weather concerns over the next week due to widespread precipitation, much higher humidities, and record cold temperatures. A slow warming trend is expected after Tuesday, but temperatures will be slow to return to near average for this time of the year with several more chances for showers and thunderstorms nearly every day. NEZ434-191015- Pine Ridge/Nebraska National Forest- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Chance of showers and slight chance of snow showers until 2400. Areas of frost after 2400 until 0300Widespread frost after 0300. Min temperature.....27-32. 24 hr trend......5 degrees cooler. Max humidity........92-98 percent. 24 hr trend......4 percent drier. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Gusts up to 25 mph decreasing to 15 mph after midnight. Chc of wetting rain.10 percent. Transport winds.....Northwest 10 to 15 mph. Mixing height.......500-2400 ft AGL. Smoke dispersal.....Poor (6200-21500 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0800, then areas of frost until 0900. Max temperature.....56-61. 24 hr trend......16 degrees warmer. Min humidity........20-26 percent. 24 hr trend......59 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph. Mixing height.......1900-3900 ft AGL increasing to 5400-7300 ft AGL in the afternoon. Smoke dispersal.....Poor to good (31100-67500 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Min temperature.....33-38. 24 hr trend......5 degrees warmer. Max humidity........76-82 percent. 24 hr trend......20 percent drier. Humidity recovery...Good. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 5 to 10 mph. Mixing height.......2700-4700 ft AGL decreasing to 500 ft AGL after midnight. Smoke dispersal.....Poor (5300-15300 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of showers until 1200, then chance of showers. Slight chance of thunderstorms after 1500. Max temperature.....62-67. 24 hr trend......7 degrees warmer. Min humidity........31-37 percent. 24 hr trend......12 percent wetter. 20-foot winds.......South 10 to 15 mph with gusts to around 35 mph. Chc of wetting rain.5 percent. Transport winds.....Southwest around 20 mph. Mixing height.......2400-4400 ft AGL increasing to 6000-8000 ft AGL in the afternoon. Smoke dispersal.....Fair (55900 knot-ft) increasing to very good (125600 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows around 40. Highs in the upper 60s. South winds around 15 mph. .FRIDAY...Mostly cloudy with showers likely and chance of thunderstorms. Lows in the lower 40s. Highs in the mid 60s. West winds around 10 mph. .SATURDAY...Warmer. Partly cloudy. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the mid 70s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. .MEMORIAL DAY...Mostly clear. Lows in the lower 50s. Highs in the upper 80s. $$ NEZ435-191015- Box Butte/South Sioux/Niobrara River- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Chance of showers and slight chance of snow showers until 2400. Areas of frost after 2400 until 0100, then widespread frost. Min temperature.....26-31. 24 hr trend......5 degrees cooler. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Gusts up to 30 mph decreasing to 15 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....North around 20 mph becoming northwest around 10 mph after midnight. Mixing height.......400-2300 ft AGL. Smoke dispersal.....Poor (9600-26800 knot-ft). .TUESDAY... Sky/weather.........Mostly sunny. Widespread frost until 0800, then areas of frost until 0900. Max temperature.....55-60. 24 hr trend......17 degrees warmer. Min humidity........20-26 percent. 24 hr trend......60 percent drier. 20-foot winds.......Northwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph. Mixing height.......1900-3900 ft AGL increasing to 5800-7800 ft AGL in the afternoon. Smoke dispersal.....Poor to good (30900-64200 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost after 0500. Min temperature.....33-38. 24 hr trend......6 degrees warmer. Max humidity........84-90 percent. 24 hr trend......11 percent drier. Humidity recovery...Excellent. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing height.......3100-5100 ft AGL decreasing to 400-1000 ft AGL after midnight. Smoke dispersal.....Poor (6800-18200 knot-ft). .WEDNESDAY... Sky/weather.........Mostly cloudy until 0900, then partly cloudy. Chance of showers. Slight chance of thunderstorms after 1500. Max temperature.....59-64. 24 hr trend......3 degrees warmer. Min humidity........38-44 percent. 24 hr trend......17 percent wetter. 20-foot winds.......South 10 to 15 mph with gusts to around 35 mph. Chc of wetting rain.5 percent. Transport winds.....South 20 to 25 mph. Mixing height.......2000-4000 ft AGL increasing to 4800-6800 ft AGL in the afternoon. Smoke dispersal.....Fair (54200 knot-ft) increasing to very good (112600 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the upper 30s. Highs in the mid 60s. South winds around 10 mph. .FRIDAY...Mostly cloudy. Showers likely and chance of thunderstorms. Lows in the upper 30s. Highs in the mid 60s. West winds around 10 mph. .SATURDAY...Warmer. Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the mid 70s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 80s. .MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. $$ NEZ436-191015- Lower North Platte River Basin/Scottsbluff National Monument- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Slight chance of snow showers until 1900. Chance of showers until 2100, then slight chance of showers until 2400. Areas of frost after 2400 until 0300, then widespread frost. Min temperature.....27-32. 24 hr trend......6 degrees cooler. Max humidity........93-99 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Gusts up to 30 mph decreasing to 15 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....North 10 to 15 mph. Mixing height.......500-2500 ft AGL. Smoke dispersal.....Poor (11100-26900 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0800, then areas of frost until 0900. Max temperature.....55-60. 24 hr trend......16 degrees warmer. Min humidity........23-29 percent. 24 hr trend......54 percent drier. 20-foot winds.......Northwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph. Mixing height.......1900-3900 ft AGL increasing to 5600-7500 ft AGL in the afternoon. Smoke dispersal.....Poor to fair (25200-57100 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy until 2400, then mostly cloudy. Slight chance of showers after 2400. Min temperature.....36-41. 24 hr trend......8 degrees warmer. Max humidity........83-89 percent. 24 hr trend......15 percent drier. Humidity recovery...Excellent. 20-foot winds.......South 5 to 10 mph. Chc of wetting rain.5 percent. Transport winds.....Southwest 10 to 15 mph. Mixing height.......2800-4800 ft AGL decreasing to 400-2000 ft AGL after midnight. Smoke dispersal.....Poor (9900-16200 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly cloudy until 1500, then partly cloudy. Slight chance of showers. Slight chance of thunderstorms after 1200. Max temperature.....59-64. 24 hr trend......1 degree warmer. Min humidity........39-45 percent. 24 hr trend......19 percent wetter. 20-foot winds.......South 10 to 15 mph with higher gusts. Chc of wetting rain.5 percent. Transport winds.....South around 20 mph. Mixing height.......2400-4400 ft AGL increasing to 4700-6700 ft AGL in the afternoon. Smoke dispersal.....Fair to very good (59700-101700 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with showers likely and chance of thunderstorms. Lows in the upper 30s. Highs in the upper 60s. South winds around 10 mph. .FRIDAY...Mostly cloudy. Showers likely and chance of thunderstorms. Lows around 40. Highs in the mid 60s. Northwest winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows around 40. Highs in the mid 70s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 80s. .MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. $$ NEZ437-191015- Lodgepole Creek/Southern Nebraska Panhandle- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Slight chance of snow showers until 2000. Slight chance of showers until 2400Slight chance of snow showers after 2200 until 2300. Widespread frost after 0400. Min temperature.....26-31. 24 hr trend......6 degrees cooler. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 10 to 15 mph. Gusts up to 30 mph decreasing to 20 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....North 15 to 20 mph. Mixing height.......700-2300 ft AGL. Smoke dispersal.....Poor (18800-34400 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny until 1200, then partly cloudy. Widespread frost until 0900Areas of frost after 0900 until 1000. Max temperature.....54-59. 24 hr trend......17 degrees warmer. Min humidity........25-31 percent. 24 hr trend......60 percent drier. 20-foot winds.......Northwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph. Mixing height.......1900-3900 ft AGL increasing to 5500-7500 ft AGL in the afternoon. Smoke dispersal.....Poor to fair (27800-50200 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy until 2100, then mostly cloudy. Slight chance of showers after 2400. Min temperature.....34-39. 24 hr trend......9 degrees warmer. Max humidity........89-95 percent. 24 hr trend......8 percent drier. Humidity recovery...Excellent. 20-foot winds.......South 5 to 10 mph. Chc of wetting rain.5 percent. Transport winds.....South 10 to 15 mph. Mixing height.......2900-4900 ft AGL decreasing to 500-2200 ft AGL after midnight. Smoke dispersal.....Poor (15900-18500 knot-ft). .WEDNESDAY... Sky/weather.........Mostly cloudy. Slight chance of showers until 1200, then chance of showers and slight chance of thunderstorms. Max temperature.....55-60. 24 hr trend......Unchanged. Min humidity........44-50 percent. 24 hr trend......20 percent wetter. 20-foot winds.......South around 15 mph with higher gusts. Chc of wetting rain.5 percent. Transport winds.....South 20 to 25 mph. Mixing height.......2600-4600 ft AGL. Smoke dispersal.....Good (62200-83700 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with showers likely and chance of thunderstorms. Lows in the mid 30s. Highs in the mid 60s. South winds around 10 mph. .FRIDAY...Mostly cloudy. Showers and chance of thunderstorms. Lows in the upper 30s. Highs in the mid 60s. Northwest winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the mid 70s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the lower 80s. .MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs in the mid 80s. $$ WYZ417-191015- Niobrara/Lower Elevations of Converse/Thunder Basin National Grassland- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Slight chance of showers and snow showers until 2100. Widespread frost after 2200. Min temperature.....24-29. 24 hr trend......5 degrees cooler. Max humidity........93-99 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Gusts up to 25 mph decreasing to 15 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....Northwest 10 to 15 mph. Mixing height.......600-2600 ft AGL. Smoke dispersal.....Poor (4300-24400 knot-ft). .TUESDAY... Sky/weather.........Mostly sunny. Widespread frost until 0900Areas of frost after 0900 until 1000. Max temperature.....52-57. 24 hr trend......15 degrees warmer. Min humidity........25-31 percent. 24 hr trend......51 percent drier. 20-foot winds.......West around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing height.......1900-3900 ft AGL increasing to 5400-7400 ft AGL in the afternoon. Smoke dispersal.....Poor to good (24500-61100 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost after 2400 until 0200, then widespread frost. Min temperature.....28-33. 24 hr trend......5 degrees warmer. Max humidity........81-87 percent. 24 hr trend......15 percent drier. Humidity recovery...Good. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing height.......2900-4900 ft AGL decreasing to 500 ft AGL after midnight. Smoke dispersal.....Poor (4100-19200 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0700. Max temperature.....63-68. 24 hr trend......11 degrees warmer. Min humidity........19-25 percent. 24 hr trend......8 percent drier. 20-foot winds.......Southwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing height.......2200-4200 ft AGL increasing to 7700-9700 ft AGL in the afternoon. Smoke dispersal.....Poor (25400 knot-ft) increasing to very good (110900 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and slight chance of thunderstorms. Lows in the mid 30s. Highs in the mid 60s. West winds around 5 mph. .FRIDAY...Partly cloudy with showers likely and chance of thunderstorms. Lows in the upper 30s. Highs in the lower 60s. Northwest winds around 10 mph. .SATURDAY...Warmer. Partly cloudy. Slight chance of showers. Lows in the upper 30s. Highs in the lower 70s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the lower 80s. .MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs in the mid 80s. $$ WYZ418-191015- Middle North Platte River Basin/Niobrara and Converse High Plains- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Chance of showers and snow showers until 2100, then slight chance of showers until 2200. Slight chance of snow showers after 2100 until 2400. Widespread frost after 2300. Min temperature.....22-27. 24 hr trend......5 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Gusts up to 25 mph decreasing to 15 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....Northwest 10 to 15 mph. Mixing height.......500-2500 ft AGL. Smoke dispersal.....Poor (6000-21900 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 1000Areas of frost after 1000 until 1100. Max temperature.....48-54. 24 hr trend......16 degrees warmer. Min humidity........33-39 percent. 24 hr trend......60 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing height.......1500-3500 ft AGL increasing to 4300-6300 ft AGL in the afternoon. Smoke dispersal.....Poor to fair (17900-45000 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost after 2200 until 2300, then widespread frost. Min temperature.....27-33. 24 hr trend......4 degrees warmer. Max humidity........84-90 percent. 24 hr trend......15 percent drier. Humidity recovery...Excellent. 20-foot winds.......Southwest around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing height.......2300-4300 ft AGL decreasing to 500 ft AGL after midnight. Smoke dispersal.....Poor (4500-13300 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0700Areas of frost after 0700 until 0900. Max temperature.....58-64. 24 hr trend......11 degrees warmer. Min humidity........24-30 percent. 24 hr trend......8 percent drier. 20-foot winds.......Southwest around 5 mph with higher gusts. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing height.......2000-4000 ft AGL increasing to 6700-8700 ft AGL in the afternoon. Smoke dispersal.....Poor (23900 knot-ft) increasing to very good (104600 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the mid 30s. Highs in the lower 60s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy with showers likely and chance of thunderstorms. Lows in the mid 30s. Highs in the lower 60s. Northwest winds around 5 mph. .SATURDAY...Mostly clear. Slight chance of showers. Lows in the upper 30s. Highs in the lower 70s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the upper 70s. .MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs in the lower 80s. $$ WYZ419-191015- North Laramie Range and Adjacent High Plains- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Slight chance of showers until 1900. Chance of snow showers until 2100, then slight chance of snow showers until 2400. Widespread frost after 0100 until 0500. Min temperature.....15-23. 24 hr trend......7 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 5 mph and gusty shifting to the west after midnight. Chc of wetting rain.10 percent. Transport winds.....Northwest 10 to 15 mph. Mixing height.......400-1900 ft AGL. Smoke dispersal.....Poor (5600-16200 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost after 0800 until 1100, then areas of frost until 1200. Max temperature.....38-46. 24 hr trend......10 degrees warmer. Min humidity........51-57 percent. 24 hr trend......35 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing height.......1200-3200 ft AGL. Smoke dispersal.....Poor (10500-18800 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Min temperature.....24-32. 24 hr trend......14 degrees warmer. Max humidity........86-92 percent. 24 hr trend......8 percent drier. Humidity recovery...Excellent. 20-foot winds.......Southwest around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing height.......600-2600 ft AGL. Smoke dispersal.....Poor (5800-6400 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Max temperature.....47-57. 24 hr trend......10 degrees warmer. Min humidity........33-39 percent. 24 hr trend......17 percent drier. 20-foot winds.......West 5 to 10 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing height.......1100-3100 ft AGL increasing to 3900-5900 ft AGL in the afternoon. Smoke dispersal.....Poor (13600 knot-ft) increasing to good (65000 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers, thunderstorms and slight chance of snow showers. Lows in the lower 30s. Highs in the mid 50s. West winds around 10 mph. .FRIDAY...Mostly cloudy with showers likely, chance of thunderstorms and snow showers. Lows in the mid 30s. Highs in the mid 50s. Northwest winds around 5 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the mid 60s. West winds around 10 mph. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the lower 70s. .MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs in the mid 70s. $$ WYZ420-191015- North Laramie Valley/Shirley Basin- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT UNTIL NOON MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy. Chance of snow showers until 2100, then slight chance of snow showers until 2400. Widespread frost after 2300. Min temperature.....15-20. 24 hr trend......8 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest around 5 mph. Gusts up to 20 mph in the evening. Chc of wetting rain.5 percent. Transport winds.....North around 15 mph becoming northwest around 5 mph after midnight. Mixing height.......500-2500 ft AGL. Smoke dispersal.....Poor (3200-14600 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 1200, then mostly sunny. Widespread frost until 0700Widespread frost after 0800 until 1400Areas of frost after 1400. Max temperature.....38-43. 24 hr trend......7 degrees warmer. Min humidity........59-65 percent. 24 hr trend......14 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West around 5 mph. Mixing height.......700-2700 ft AGL. Smoke dispersal.....Poor (5500-14800 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost until 2000Widespread frost after 2000. Min temperature.....22-27. 24 hr trend......6 degrees warmer. Max humidity........93-99 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....South 5 to 10 mph. Mixing height.......500-2500 ft AGL. Smoke dispersal.....Poor (3900-5400 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900. Max temperature.....46-51. 24 hr trend......9 degrees warmer. Min humidity........43-49 percent. 24 hr trend......15 percent drier. 20-foot winds.......Southwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing height.......400-2200 ft AGL increasing to 2200-4200 ft AGL in the afternoon. Smoke dispersal.....Poor to fair (7800-42700 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 20s. Highs in the mid 50s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy with showers likely, chance of thunderstorms and snow showers. Lows in the lower 30s. Highs in the mid 50s. West winds around 5 mph. .SATURDAY...Partly cloudy. Lows in the lower 30s. Highs in the mid 60s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 30s. Highs around 70. .MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs in the mid 70s. $$ WYZ421-191015- Ferris/Seminoe/Shirley Mountains- 308 PM MDT Mon May 18 2026 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT UNTIL NOON MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy. Chance of snow showers until 2100, then slight chance of snow showers until 2400. Widespread frost after 0100. Min temperature.....15-21. 24 hr trend......8 degrees cooler. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 5 mph shifting to the west after midnight. Chc of wetting rain.5 percent. Transport winds.....North around 10 mph shifting to the west after midnight. Mixing height.......300-2100 ft AGL. Smoke dispersal.....Poor (2900-12800 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 1200, then mostly sunny. Widespread frost until 1500Areas of frost after 1500. Max temperature.....34-39. 24 hr trend......7 degrees warmer. Min humidity........67-73 percent. 24 hr trend......20 percent drier. 20-foot winds.......Southwest around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 5 mph. Mixing height.......400-2200 ft AGL. Smoke dispersal.....Poor (3800-9900 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Widespread frost. Min temperature.....20-25. 24 hr trend......4 degrees warmer. Max humidity........81-87 percent. 24 hr trend......19 percent drier. Humidity recovery...Good. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing height.......400-1600 ft AGL. Smoke dispersal.....Poor (3600-4500 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900. Max temperature.....42-48. 24 hr trend......8 degrees warmer. Min humidity........48-54 percent. 24 hr trend......21 percent drier. 20-foot winds.......Southwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing height.......1000-3000 ft AGL. Smoke dispersal.....Poor (6400-31000 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy. Chance of showers, thunderstorms and slight chance of snow showers. Lows around 30. Highs in the lower 50s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy with showers likely with possible snow showers and thunderstorms. Lows in the lower 30s. Highs in the mid 50s. Northwest winds around 5 mph. .SATURDAY...Partly cloudy. Lows in the mid 30s. Highs in the lower 60s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows around 40. Highs around 70. .MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs in the lower 70s. $$ WYZ422-191015- Central and West Carbon- 308 PM MDT Mon May 18 2026 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT UNTIL NOON MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy. Chance of snow showers until 2400. Widespread frost after 2300. Min temperature.....15-20. 24 hr trend......10 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 5 mph and gusty in the evening becoming light. Chc of wetting rain.5 percent. Transport winds.....Northeast around 15 mph decreasing to around 5 mph after midnight. Mixing height.......500-2100 ft AGL. Smoke dispersal.....Poor (2800-15900 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 1200, then mostly sunny. Widespread frost until 0700Widespread frost after 0800. Max temperature.....33-38. 24 hr trend......5 degrees warmer. Min humidity........73-79 percent. 24 hr trend......13 percent drier. 20-foot winds.......Light winds becoming west around 5 mph in the afternoon. Chc of wetting rain.Zero percent. Transport winds.....South around 5 mph shifting to the north in the afternoon. Mixing height.......400-1800 ft AGL. Smoke dispersal.....Poor (3000-7700 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Widespread frost. Min temperature.....18-23. 24 hr trend......4 degrees warmer. Max humidity........88-94 percent. 24 hr trend......4 percent drier. Humidity recovery...Excellent. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 5 mph. Mixing height.......400-1400 ft AGL. Smoke dispersal.....Poor (2400-3300 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900. Max temperature.....43-48. 24 hr trend......9 degrees warmer. Min humidity........49-55 percent. 24 hr trend......17 percent drier. 20-foot winds.......Light winds becoming west around 5 mph in the afternoon. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing height.......900-2900 ft AGL. Smoke dispersal.....Poor (4600-24600 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 20s. Highs in the lower 50s. Southwest winds around 5 mph. .FRIDAY...Partly cloudy. Chance of showers, snow showers and slight chance of thunderstorms. Lows in the lower 30s. Highs in the mid 50s. West winds around 5 mph. .SATURDAY...Partly cloudy. Lows in the mid 30s. Highs in the lower 60s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 30s. Highs around 70. .MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs in the mid 70s. $$ WYZ423-191015- Southwest Carbon County- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT UNTIL NOON MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Slight chance of snow showers until 2400. Widespread frost after 2300. Min temperature.....16-22. 24 hr trend......10 degrees cooler. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northeast 5 to 10 mph. Gusts up to 35 mph decreasing to 15 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....Northeast around 20 mph decreasing to around 10 mph after midnight. Mixing height.......300-2300 ft AGL. Smoke dispersal.....Poor (4600-22400 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 1200, then mostly sunny. Widespread frost. Max temperature.....36-44. 24 hr trend......4 degrees warmer. Min humidity........61-67 percent. 24 hr trend......18 percent drier. 20-foot winds.......North around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Northeast around 10 mph. Mixing height.......1100-3100 ft AGL. Smoke dispersal.....Poor (7200-26900 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Widespread frost. Min temperature.....20-25. 24 hr trend......2 degrees warmer. Max humidity........85-91 percent. 24 hr trend......12 percent drier. Humidity recovery...Excellent. 20-foot winds.......Northeast around 5 mph in the evening becoming light. Chc of wetting rain.Zero percent. Transport winds.....Northeast 5 to 10 mph. Mixing height.......500-2500 ft AGL decreasing to 400 ft AGL after midnight. Smoke dispersal.....Poor (2000-7400 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900. Max temperature.....46-54. 24 hr trend......9 degrees warmer. Min humidity........38-44 percent. 24 hr trend......21 percent drier. 20-foot winds.......Light winds becoming west around 5 mph in the afternoon. Gusts up to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 5 to 10 mph. Mixing height.......1400-3400 ft AGL increasing to 3600-5600 ft AGL in the afternoon. Smoke dispersal.....Poor to fair (7600-51000 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy. Chance of showers and thunderstorms. Lows around 30. Highs in the upper 50s. South winds around 5 mph. .FRIDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the lower 30s. Highs in the upper 50s. West winds around 5 mph. .SATURDAY...Partly cloudy. Lows in the mid 30s. Highs in the mid 60s. South winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 30s. Highs in the lower 70s. .MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs in the mid 70s. $$ WYZ424-191015- Sierra Madre Range/Medicine Bow NF- 308 PM MDT Mon May 18 2026 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING... .TONIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Snow showers until 2100, then chance of snow showers until 2400, then slight chance of snow showers until 0300. Snow accumulation up to 3 inches. Min temperature.....15-21. 24 hr trend......16 degrees cooler. Max humidity........93-99 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northeast around 5 mph and gusty in the evening becoming light. Chc of wetting rain.20 percent. Transport winds.....Northeast around 15 mph becoming east around 5 mph after midnight. Mixing height.......400-1900 ft AGL. Smoke dispersal.....Poor (3400-15200 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny until 1200, then partly cloudy. Slight chance of thunderstorms and snow showers after 1200. Max temperature.....34-44. 24 hr trend......5 degrees warmer. Min humidity........57-63 percent. 24 hr trend......9 percent drier. 20-foot winds.......Light winds becoming north around 5 mph in the afternoon. Chc of wetting rain.5 percent. Transport winds.....East around 5 mph shifting to the northwest in the afternoon. Mixing height.......1600-3600 ft AGL. Smoke dispersal.....Poor (7800-22700 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Min temperature.....20-25. 24 hr trend......9 degrees warmer. Max humidity........82-88 percent. 24 hr trend......19 percent drier. Humidity recovery...Excellent. 20-foot winds.......Southeast around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....East around 5 mph shifting to the south after midnight. Mixing height.......700-2700 ft AGL decreasing to 500 ft AGL after midnight. Smoke dispersal.....Poor (2800-6300 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Max temperature.....42-50. 24 hr trend......8 degrees warmer. Min humidity........37-43 percent. 24 hr trend......35 percent drier. 20-foot winds.......Light winds becoming west around 5 mph in the afternoon. Gusts up to 20 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing height.......2100-4100 ft AGL increasing to 4100-6100 ft AGL in the afternoon. Smoke dispersal.....Poor to good (17400-65300 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers, thunderstorms and snow showers. Lows in the mid 20s. Highs around 50. South winds around 5 mph. .FRIDAY...Mostly cloudy. Showers, snow showers likely and slight chance of thunderstorms. Lows around 30. Highs around 50. Southwest winds around 5 mph. .SATURDAY...Partly cloudy. Lows in the lower 30s. Highs in the upper 50s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the mid 30s. Highs in the mid 60s. .MEMORIAL DAY...Mostly clear. Lows around 40. Highs in the upper 60s. $$ WYZ425-191015- Upper North Platte River Basin- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy. Snow showers likely until 2100, then chance of snow showers until 2400, then slight chance of snow showers until 0300. Snow accumulation up to 2 inches. Min temperature.....17-22. 24 hr trend......11 degrees cooler. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 5 mph and gusty in the evening becoming light. Chc of wetting rain.15 percent. Transport winds.....Northeast around 15 mph decreasing to around 5 mph after midnight. Mixing height.......500-2300 ft AGL. Smoke dispersal.....Poor (2400-15200 knot-ft). .TUESDAY... Sky/weather.........Mostly cloudy until 0900, then partly cloudy. Widespread frost until 0700Widespread frost after 0800 until 1300Areas of frost after 1300. Max temperature.....38-43. 24 hr trend......3 degrees warmer. Min humidity........60-66 percent. 24 hr trend......28 percent drier. 20-foot winds.......Light winds becoming northwest around 5 mph in the afternoon. Chc of wetting rain.Zero percent. Transport winds.....Southeast around 5 mph shifting to the north in the afternoon. Mixing height.......700-2700 ft AGL. Smoke dispersal.....Poor (4200-15200 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost until 1900Widespread frost after 1900. Min temperature.....21-26. 24 hr trend......4 degrees warmer. Max humidity........84-90 percent. 24 hr trend......8 percent drier. Humidity recovery...Excellent. 20-foot winds.......Light winds becoming south around 5 mph after midnight. Chc of wetting rain.Zero percent. Transport winds.....South around 5 mph. Mixing height.......400-2000 ft AGL. Smoke dispersal.....Poor (2700-4700 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900. Max temperature.....48-53. 24 hr trend......10 degrees warmer. Min humidity........35-41 percent. 24 hr trend......21 percent drier. 20-foot winds.......Light winds becoming west around 5 mph and gusty in the afternoon. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 5 mph shifting to the west in the afternoon. Mixing height.......1600-3600 ft AGL. Smoke dispersal.....Poor (7300-34700 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 20s. Highs in the mid 50s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy. Chance of showers, snow showers and slight chance of thunderstorms. Lows in the lower 30s. Highs in the mid 50s. West winds around 5 mph. .SATURDAY...Partly cloudy. Lows in the lower 30s. Highs in the mid 60s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 30s. Highs in the lower 70s. .MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs in the mid 70s. $$ WYZ426-191015- Snowy Range/Medicine Bow NF- 308 PM MDT Mon May 18 2026 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING... .TONIGHT... Sky/weather.........Mostly cloudy. Snow showers until 2100, then chance of snow showers until 2400, then slight chance of snow showers until 0300. Snow accumulation of 1 to 2 inches. Min temperature.....11-19. 24 hr trend......6 degrees cooler. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northeast around 5 mph in the evening becoming light. Chc of wetting rain.15 percent. Transport winds.....Northeast 5 to 10 mph. Mixing height.......600-2400 ft AGL. Smoke dispersal.....Poor (2900-15000 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy. Slight chance of snow showers after 1200 until 1500. Slight chance of thunderstorms after 1200. Chance of snow showers after 1500. Max temperature.....32-40. 24 hr trend......8 degrees warmer. Min humidity........63-69 percent. 24 hr trend......21 percent drier. 20-foot winds.......Light winds becoming north around 5 mph in the afternoon. Gusts up to 15 mph. Chc of wetting rain.5 percent. Transport winds.....West 5 to 10 mph. Mixing height.......1400-3400 ft AGL. Smoke dispersal.....Poor (6900-19400 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Slight chance of snow showers until 2100. Min temperature.....18-24. 24 hr trend......2 degrees warmer. Max humidity........91-97 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing height.......400-2400 ft AGL. Smoke dispersal.....Poor (3700-6000 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Slight chance of thunderstorms and snow showers after 1200. Slight chance of showers after 1500. Max temperature.....41-49. 24 hr trend......8 degrees warmer. Min humidity........43-49 percent. 24 hr trend......24 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing height.......2700-4700 ft AGL. Smoke dispersal.....Poor to good (18500-65500 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with showers, snow showers likely and chance of thunderstorms. Lows in the mid 20s. Highs around 50. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy with showers, snow showers likely and chance of thunderstorms. Lows in the upper 20s. Highs around 50. West winds around 5 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 20s. Highs in the upper 50s. Southwest winds around 5 mph. .SUNDAY...Mostly clear. Lows in the mid 30s. Highs in the mid 60s. .MEMORIAL DAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the upper 60s. $$ WYZ427-191015- North Snowy Range Foothills- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT UNTIL NOON MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy. Snow showers likely until 2100, then chance of snow showers until 2400, then slight chance of snow showers until 0300. Widespread frost after 0300. Snow accumulation up to 1 inch. Min temperature.....15-20. 24 hr trend......11 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 5 mph shifting to the southwest after midnight. Chc of wetting rain.10 percent. Transport winds.....Northeast around 10 mph shifting to the west after midnight. Mixing height.......500-2300 ft AGL. Smoke dispersal.....Poor (2900-14300 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 1200, then mostly sunny until 1500, then partly cloudy. Widespread frost until 1500, then areas of frost. Max temperature.....35-40. 24 hr trend......5 degrees warmer. Min humidity........68-74 percent. 24 hr trend......20 percent drier. 20-foot winds.......West around 5 mph shifting to the north in the afternoon. Chc of wetting rain.Zero percent. Transport winds.....West around 5 mph shifting to the northeast in the afternoon. Mixing height.......400-2000 ft AGL. Smoke dispersal.....Poor (3700-8600 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost until 1900Widespread frost after 1900. Min temperature.....21-26. 24 hr trend......8 degrees warmer. Max humidity........85-91 percent. 24 hr trend......8 percent drier. Humidity recovery...Excellent. 20-foot winds.......South around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southeast around 10 mph shifting to the southwest after midnight. Mixing height.......400-1500 ft AGL. Smoke dispersal.....Poor (3500-4200 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900. Max temperature.....44-49. 24 hr trend......9 degrees warmer. Min humidity........49-55 percent. 24 hr trend......17 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing height.......600-2600 ft AGL. Smoke dispersal.....Poor (6500-26300 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 20s. Highs in the lower 50s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy with showers likely with possible snow showers and thunderstorms. Lows in the lower 30s. Highs in the mid 50s. West winds around 5 mph. .SATURDAY...Mostly clear. Lows in the mid 30s. Highs in the lower 60s. Southwest winds around 10 mph. .SUNDAY...Mostly clear. Lows around 40. Highs in the upper 60s. .MEMORIAL DAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the lower 70s. $$ WYZ428-191015- Southern Laramie Valley- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Cloudy. Snow showers likely until 2100, then chance of snow showers until 2400, then slight chance of snow showers until 0300. Snow accumulation up to 1 inch. Min temperature.....17-22. 24 hr trend......9 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 5 mph shifting to the west after midnight. Chc of wetting rain.10 percent. Transport winds.....North around 10 mph shifting to the northwest after midnight. Mixing height.......500-2300 ft AGL. Smoke dispersal.....Poor (4300-15300 knot-ft). .TUESDAY... Sky/weather.........Mostly cloudy until 0900, then partly cloudy. Widespread frost after 0800 until 1300Areas of frost after 1300 until 1600. Slight chance of thunderstorms and snow showers after 1200Slight chance of showers after 1500. Max temperature.....38-43. 24 hr trend......6 degrees warmer. Min humidity........64-70 percent. 24 hr trend......18 percent drier. 20-foot winds.......Southwest around 5 mph shifting to the northeast in the afternoon. Chc of wetting rain.5 percent. Transport winds.....West around 5 mph shifting to the north in the afternoon. Mixing height.......1000-3000 ft AGL. Smoke dispersal.....Poor (5100-13100 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Slight chance of showers until 2100. Slight chance of snow showers until 2400. Areas of frost until 2100Widespread frost after 2100. Min temperature.....25-30. 24 hr trend......8 degrees warmer. Max humidity........92-98 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......South around 5 mph. Chc of wetting rain.5 percent. Transport winds.....South around 10 mph. Mixing height.......600-2600 ft AGL. Smoke dispersal.....Poor (5300-6600 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy. Widespread frost until 0900. Chance of showers and slight chance of thunderstorms after 1200. Max temperature.....48-53. 24 hr trend......10 degrees warmer. Min humidity........46-52 percent. 24 hr trend......16 percent drier. 20-foot winds.......Southwest around 5 mph shifting to the northwest in the afternoon. Gusts up to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph shifting to the northwest in the afternoon. Mixing height.......1800-3800 ft AGL. Smoke dispersal.....Poor to fair (9100-44000 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the upper 20s. Highs in the mid 50s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy with showers likely, chance of thunderstorms and snow showers. Lows in the lower 30s. Highs in the mid 50s. West winds around 5 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 30s. Highs in the mid 60s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 30s. Highs around 70. .MEMORIAL DAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the mid 70s. $$ WYZ429-191015- Southern Laramie Range- 308 PM MDT Mon May 18 2026 ...WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... ...FREEZE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY MORNING... .TONIGHT... Sky/weather.........Mostly cloudy. Chance of snow showers until 2100, then slight chance of snow showers until 2400. Widespread frost after 0300. Min temperature.....17-22. 24 hr trend......8 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......North around 10 mph and gusty shifting to the west after midnight. Chc of wetting rain.10 percent. Transport winds.....North 10 to 15 mph. Mixing height.......500-2000 ft AGL. Smoke dispersal.....Poor (7500-16700 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy. Widespread frost until 1400Areas of frost after 1400 until 1600. Slight chance of thunderstorms and snow showers after 1500. Slight chance of showers after 1700. Max temperature.....35-40. 24 hr trend......7 degrees warmer. Min humidity........68-74 percent. 24 hr trend......23 percent drier. 20-foot winds.......Southwest around 5 mph shifting to the southeast in the afternoon. Gusts up to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph shifting to the southwest in the afternoon. Mixing height.......900-2900 ft AGL. Smoke dispersal.....Poor (7200-14700 knot-ft). .TUESDAY NIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Chance of showers and slight chance of snow showers until 2400Chance of snow showers after 2400. Widespread frost after 2100 until 2200. Min temperature.....27-32. 24 hr trend......9 degrees warmer. Max humidity........92-98 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......South 5 to 10 mph and gusty. Chc of wetting rain.5 percent. Transport winds.....South 10 to 15 mph. Mixing height.......500-2300 ft AGL. Smoke dispersal.....Poor (8000-9200 knot-ft). .WEDNESDAY... Sky/weather.........Mostly cloudy until 0900, then partly cloudy. Widespread frost after 0700 until 0900. Slight chance of snow showers after 1200 until 1500. Chance of showers and thunderstorms after 1200. Max temperature.....47-52. 24 hr trend......13 degrees warmer. Min humidity........48-54 percent. 24 hr trend......20 percent drier. 20-foot winds.......Southwest around 5 mph shifting to the west in the afternoon. Gusts up to 20 mph. Chc of wetting rain.5 percent. Transport winds.....Southwest around 15 mph shifting to the west in the afternoon. Mixing height.......1300-3300 ft AGL increasing to 3800-5800 ft AGL in the afternoon. Smoke dispersal.....Poor to good (15700-62800 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with showers likely with possible thunderstorms and snow showers. Lows in the lower 30s. Highs in the mid 50s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy. Showers likely, chance of thunderstorms and snow showers. Lows in the mid 30s. Highs in the mid 50s. West winds around 5 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 30s. Highs in the lower 60s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows around 40. Highs in the upper 60s. .MEMORIAL DAY...Mostly clear. Slight chance of showers and thunderstorms. Lows in the mid 40s. Highs in the lower 70s. $$ WYZ430-191015- Laramie Foothills and High Plains- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Chance of snow showers and showers until 2400. Widespread frost after 0200. Min temperature.....21-26. 24 hr trend......7 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Gusts up to 30 mph decreasing to 20 mph after midnight. Chc of wetting rain.10 percent. Transport winds.....North around 15 mph. Mixing height.......600-2200 ft AGL. Smoke dispersal.....Poor (14800-26300 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy. Widespread frost until 1100Areas of frost after 1100 until 1300. Max temperature.....44-50. 24 hr trend......13 degrees warmer. Min humidity........48-54 percent. 24 hr trend......54 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West 5 to 10 mph. Mixing height.......1400-3400 ft AGL increasing to 3400-5400 ft AGL in the afternoon. Smoke dispersal.....Poor (13300-25900 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy until 2100, then mostly cloudy until 0300, then partly cloudy. Slight chance of showers until 2400Chance of showers after 2400. Min temperature.....30-35. 24 hr trend......11 degrees warmer. Max humidity........94-100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......South 5 to 10 mph and gusty. Chc of wetting rain.5 percent. Transport winds.....South around 10 mph increasing to around 20 mph after midnight. Mixing height.......1800-3800 ft AGL decreasing to 500-1600 ft AGL after midnight. Smoke dispersal.....Poor (12700-14900 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of thunderstorms after 1200 until 1500. Chance of showers after 1200. Chance of thunderstorms after 1500. Max temperature.....54-59. 24 hr trend......9 degrees warmer. Min humidity........39-45 percent. 24 hr trend......1 percent wetter. 20-foot winds.......Southwest 5 to 10 mph with higher gusts. Chc of wetting rain.5 percent. Transport winds.....Southwest 15 to 20 mph. Mixing height.......1800-3800 ft AGL increasing to 4900-6900 ft AGL in the afternoon. Smoke dispersal.....Poor to good (34700-66600 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with showers likely and chance of thunderstorms. Lows in the mid 30s. Highs in the lower 60s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy. Showers likely and chance of thunderstorms. Lows in the mid 30s. Highs around 60. Northwest winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the upper 60s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the mid 70s. .MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs in the upper 70s. $$ WYZ431-191015- Laramie East High Plains- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Snow showers likely and chance of showers until 2400. Widespread frost after 0300. No snow accumulation. Min temperature.....24-29. 24 hr trend......6 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph and gusty. Chc of wetting rain.5 percent. Transport winds.....North 15 to 20 mph. Mixing height.......700-2700 ft AGL. Smoke dispersal.....Poor (16800-30900 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy. Widespread frost until 0900, then areas of frost until 1000. Max temperature.....50-55. 24 hr trend......14 degrees warmer. Min humidity........33-39 percent. 24 hr trend......60 percent drier. 20-foot winds.......Northwest around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph. Mixing height.......1700-3700 ft AGL increasing to 4900-6500 ft AGL in the afternoon. Smoke dispersal.....Poor (17900-38000 knot-ft). .TUESDAY NIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Slight chance of showers until 2400Chance of showers after 2400. Min temperature.....33-38. 24 hr trend......9 degrees warmer. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......South 5 to 10 mph. Gusts up to 15 mph increasing to 25 mph after midnight. Chc of wetting rain.5 percent. Transport winds.....South 10 to 15 mph. Mixing height.......2400-4400 ft AGL decreasing to 600-2400 ft AGL after midnight. Smoke dispersal.....Poor (15800-16400 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy until 0900, then mostly cloudy. Slight chance of thunderstorms after 1200 until 1500. Chance of showers after 1200. Chance of thunderstorms after 1500. Max temperature.....57-62. 24 hr trend......6 degrees warmer. Min humidity........39-45 percent. 24 hr trend......9 percent wetter. 20-foot winds.......South 10 to 15 mph with higher gusts. Chc of wetting rain.5 percent. Transport winds.....South 15 to 20 mph. Mixing height.......2100-4100 ft AGL increasing to 4800-6800 ft AGL in the afternoon. Smoke dispersal.....Fair to good (58200-82000 knot-ft). .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with showers likely and chance of thunderstorms. Lows in the upper 30s. Highs in the mid 60s. South winds around 10 mph. .FRIDAY...Mostly cloudy. Showers likely and chance of thunderstorms. Lows in the upper 30s. Highs in the lower 60s. Northwest winds around 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the lower 70s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows in the lower 40s. Highs in the upper 70s. .MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs in the lower 80s. $$ WYZ432-191015- Bordeaux/Chugwater/Wheatland- 308 PM MDT Mon May 18 2026 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 0300, then partly cloudy. Snow showers and chance of showers until 2400. Areas of frost after 2400 until 0100, then widespread frost. Little or no snow accumulation. Min temperature.....25-30. 24 hr trend......6 degrees cooler. Max humidity........100 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest around 10 mph and gusty shifting to the west after midnight. Chc of wetting rain.10 percent. Transport winds.....Northwest 10 to 15 mph. Mixing height.......400-2300 ft AGL. Smoke dispersal.....Poor (9500-24600 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0900, then areas of frost until 1000. Max temperature.....50-55. 24 hr trend......13 degrees warmer. Min humidity........34-40 percent. 24 hr trend......53 percent drier. 20-foot winds.......West around 5 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing height.......1500-3500 ft AGL increasing to 4300-6300 ft AGL in the afternoon. Smoke dispersal.....Poor (15300-39100 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy. Areas of frost after 0500. Min temperature.....33-38. 24 hr trend......6 degrees warmer. Max humidity........88-94 percent. 24 hr trend......11 percent drier. Humidity recovery...Excellent. 20-foot winds.......Southwest 5 to 10 mph and gusty. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing height.......2100-4100 ft AGL decreasing to 600 ft AGL after midnight. Smoke dispersal.....Poor (6100-12500 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy. Areas of frost until 0700. Slight chance of showers and thunderstorms after 1200. Max temperature.....60-65. 24 hr trend......11 degrees warmer. Min humidity........25-31 percent. 24 hr trend......11 percent drier. 20-foot winds.......Southwest around 10 mph with higher gusts. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing height.......2000-4000 ft AGL increasing to 6500-8500 ft AGL in the afternoon. Smoke dispersal.....Poor (35300 knot-ft) increasing to good (99500 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the upper 30s. Highs in the mid 60s. Southwest winds around 5 mph. .FRIDAY...Mostly cloudy. Showers likely and chance of thunderstorms. Lows around 40. Highs in the lower 60s. Northwest winds around 5 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the lower 70s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows in the upper 40s. Highs around 80. .MEMORIAL DAY...Mostly clear. Lows in the lower 50s. Highs in the lower 80s. $$ WYZ433-191015- Goshen/Middle-Lower North Platte River Basin- 308 PM MDT Mon May 18 2026 ...FREEZE WARNING IN EFFECT FROM 8 PM THIS EVENING TO 10 AM MDT TUESDAY... .TONIGHT... Sky/weather.........Mostly cloudy until 2400, then partly cloudy. Chance of showers until 2400. Areas of frost after 2300 until 0200, then widespread frost. Min temperature.....27-32. 24 hr trend......6 degrees cooler. Max humidity........93-99 percent. 24 hr trend......Unchanged. Humidity recovery...Excellent. 20-foot winds.......Northwest 5 to 10 mph. Chc of wetting rain.5 percent. Transport winds.....Northwest 10 to 15 mph. Mixing height.......600-2600 ft AGL. Smoke dispersal.....Poor (6800-25900 knot-ft). .TUESDAY... Sky/weather.........Partly cloudy until 0900, then mostly sunny. Widespread frost until 0800, then areas of frost until 0900. Max temperature.....54-59. 24 hr trend......16 degrees warmer. Min humidity........24-30 percent. 24 hr trend......52 percent drier. 20-foot winds.......West around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing height.......1800-3800 ft AGL increasing to 5500-7100 ft AGL in the afternoon. Smoke dispersal.....Poor to fair (19000-50200 knot-ft). .TUESDAY NIGHT... Sky/weather.........Partly cloudy until 0300, then mostly cloudy. Min temperature.....35-40. 24 hr trend......8 degrees warmer. Max humidity........85-91 percent. 24 hr trend......11 percent drier. Humidity recovery...Excellent. 20-foot winds.......Southwest around 5 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing height.......2500-4500 ft AGL decreasing to 600 ft AGL after midnight. Smoke dispersal.....Poor (5600-15000 knot-ft). .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms after 1200. Max temperature.....63-68. 24 hr trend......9 degrees warmer. Min humidity........27-33 percent. 24 hr trend......1 percent drier. 20-foot winds.......South around 10 mph with higher gusts. Chc of wetting rain.5 percent. Transport winds.....Southwest around 15 mph. Mixing height.......2300-4300 ft AGL increasing to 7100-9100 ft AGL in the afternoon. Smoke dispersal.....Fair (51100 knot-ft) increasing to very good (110400 knot-ft) in the afternoon. .FORECAST DAYS 3 THROUGH 7... .THURSDAY...Partly cloudy with chance of showers and thunderstorms. Lows in the upper 30s. Highs in the upper 60s. South winds around 5 mph. .FRIDAY...Mostly cloudy. Showers likely and chance of thunderstorms. Lows around 40. Highs in the mid 60s. Northwest winds around 5 mph. .SATURDAY...Partly cloudy. Slight chance of showers. Lows in the lower 40s. Highs in the mid 70s. West winds around 5 mph. .SUNDAY...Mostly clear. Lows in the mid 40s. Highs in the mid 80s. .MEMORIAL DAY...Mostly clear. Lows around 50. Highs in the upper 80s. $$