FNUS55 KRIW 191016 FWFRIW Fire Weather Planning Forecast for Western and Central Wyoming National Weather Service Riverton WY 416 AM MDT Tue May 19 2026 .DISCUSSION... ...Yellowstone NP and Teton dispatch areas (includes fire weather zones 140...414...415...and 416)... Increasing clouds over the mountains in the afternoon, with a 20 to 30% chance for virga showers over northern portions of zone 140 through the afternoon. Winds will generally be light (10 to 15 mph or less) through the day into the evening. ...Cody dispatch area (includes fire weather zones 275...276... 282...283...285...286...287...288...and 289)... ***FREEZE WARNING IN EFFECT FOR ZONES 275, 276, 282, 283 AND 289 UNTIL 9 AM MDT THIS MORNING*** Increasing clouds over ZONES 286/288 in the afternoon, with a 20 to 30% chance for virga showers in these zones through the afternoon. Some of these showers could move off the mountains into the lower elevations, especially portions of zone 276. Winds will generally be light (10 to 15 mph or less) through the day into the evening. ...Casper dispatch area (includes fire weather zones 277...278... 279...280...281...285...289...and 300)... ***FREEZE WARNING IN EFFECT FOR ZONES 280, 281 AND 289 UNTIL 9 AM MDT THIS MORNING*** Mainly dry conditions across the dispatch area, with partly cloudy skies for zones 277, 278 and 279 through the afternoon. Winds will generally be light (10 to 15 mph or less) through the day into the evening. ...Thunderstorms imply strong gusty and erratic winds... WYZ280-201230- Natrona County/Casper BLM- Including the cities of Casper and Midwest 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Chance of thunder...0 percent. Max temperature.....47-52. 24 hr trend......15 degrees warmer. Min humidity........38-44 percent. 24 hr trend......43 percent drier. 20-foot winds.......Southwest winds around 10 mph and gusty. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......1200-3200 ft agl until 1200, then 4000-6000 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....27-32. 24 hr trend......5 degrees warmer. Max humidity........74-80 percent. 24 hr trend......16 percent drier. Humidity recovery...Excellent. 20-foot winds.......Southwest winds around 10 mph and gusty. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......2000-4000 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....54-59. 24 hr trend......6 degrees warmer. Min humidity........35-41 percent. 24 hr trend......2 percent drier. 20-foot winds.......Southwest winds 10 to 15 mph with gusts to around 25 mph. Ridge top winds.....Southwest 15 to 20 mph. Chc of wetting rain.Zero percent. Transport winds.....West 15 to 20 mph. Mixing Height.......2200-4200 ft agl until 1200, then 6400-8400 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 30s. Southwest winds around 10 mph. .THURSDAY...Mostly cloudy with showers likely, slight chance of thunderstorms and snow showers. Lows in the mid 30s. Highs in the mid 50s. North winds around 10 mph. .FRIDAY...Partly cloudy with chance of showers, slight chance of thunderstorms and snow showers. Lows in the upper 30s. Highs around 60. Southwest winds around 10 mph. .SATURDAY...Mostly clear. Lows in the lower 40s. Highs around 70. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs 76 to 81. $$ WYZ283-201230- Upper Wind River Basin/Wind River Basin- Including the cities of Crowheart, Lander, Riverton, and Shoshoni 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....48-53. 24 hr trend......14 degrees warmer. Min humidity........39-45 percent. 24 hr trend......31 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......1200-3200 ft agl until 1200, then 4200-6200 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....28-33. 24 hr trend......7 degrees warmer. Max humidity........72-78 percent. 24 hr trend......13 percent drier. Humidity recovery...Excellent. 20-foot winds.......South winds around 10 mph until 0300, then downslope/downvalley 4-7 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......1800-3800 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....54-59. 24 hr trend......8 degrees warmer. Min humidity........39-45 percent. 24 hr trend......Unchanged. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph with gusts to around 25 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 6600-8600 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Slight chance of showers after midnight. Lows in the mid 30s. Southwest winds around 10 mph. .THURSDAY...Showers with possible snow showers and thunderstorms. Lows in the mid 30s. Highs in the lower 50s. North winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the lower 60s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the lower 40s. Highs in the lower 70s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs 76 to 81. $$ WYZ285-201230- South Bighorn Mountains- 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....44-49. 24 hr trend......14 degrees warmer. Min humidity........31-37 percent. 24 hr trend......43 percent drier. 20-foot winds.......West winds around 10 mph and gusty. Ridge top winds.....West around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......1000-3000 ft agl until 1200, then 3800-5800 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....28-33. 24 hr trend......9 degrees warmer. Max humidity........58-64 percent. 24 hr trend......31 percent drier. Humidity recovery...Good. 20-foot winds.......Southwest winds around 10 mph and gusty. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......1800-3800 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....52-57. 24 hr trend......8 degrees warmer. Min humidity........27-33 percent. 24 hr trend......3 percent drier. 20-foot winds.......Southwest winds around 10 mph with higher gusts. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 6600-8600 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Lows in the mid 30s. West winds around 10 mph. .THURSDAY...Showers with possible snow showers and thunderstorms likely. Lows in the lower 30s. Highs in the upper 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers, thunderstorms and snow showers. Lows in the upper 30s. Highs in the mid 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the mid 60s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs 69 to 74. $$ WYZ281-201230- Johnson County/Casper BLM- Including the cities of Buffalo and Kaycee 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....52-57. 24 hr trend......18 degrees warmer. Min humidity........23-29 percent. 24 hr trend......40 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing Height.......2000-4000 ft agl until 1200, then 6800-8800 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....32-37. 24 hr trend......7 degrees warmer. Max humidity........59-65 percent. 24 hr trend......25 percent drier. Humidity recovery...Good. 20-foot winds.......South winds around 10 mph with gusts to around 25 mph. Ridge top winds.....South around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 15 mph. Mixing Height.......3400-5400 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....61-66. 24 hr trend......8 degrees warmer. Min humidity........22-28 percent. 24 hr trend......1 percent drier. 20-foot winds.......South winds around 10 mph until 1200, then upslope/upvalley 5-9 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......3200-5200 ft agl until 1200, then 9400-11400 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 30s. Winds generally less than 10 mph. .THURSDAY...Cooler. Showers with possible snow showers and thunderstorms. Lows in the mid 30s. Highs in the mid 50s. North winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the upper 30s. Highs in the mid 60s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the lower 70s. Winds generally less than 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs 79 to 84. $$ WYZ282-201230- South Bighorn Basin/Worland BLM- Including the cities of Ten Sleep, Thermopolis, and Worland 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....49-54. 24 hr trend......15 degrees warmer. Min humidity........21-27 percent. 24 hr trend......22 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 10 mph. Mixing Height.......2000-4000 ft agl until 1200, then 6400-8400 ft agl. Smoke dispersal.....Poor until 1200, then good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....29-34. 24 hr trend......8 degrees warmer. Max humidity........56-62 percent. 24 hr trend......19 percent drier. Humidity recovery...Moderate. 20-foot winds.......South winds around 10 mph until 0300, then downslope/downvalley 4-7 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......3200-5200 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....57-62. 24 hr trend......8 degrees warmer. Min humidity........21-27 percent. 24 hr trend......2 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then southwest around 10 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2400-4400 ft agl until 1200, then 8000-10000 ft agl. Smoke dispersal.....Poor until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Chance of showers after midnight. Lows in the upper 30s. West winds around 10 mph. .THURSDAY...Mostly cloudy. Showers, snow showers likely and slight chance of thunderstorms. Lows in the mid 30s. Highs in the mid 50s. Northwest winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows around 40. Highs in the mid 60s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the mid 70s. Winds generally less than 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs 80 to 85. $$ WYZ275-201230- North Bighorn Basin/Worland BLM- Including the cities of Greybull, Lovell, and Powell 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....49-54. 24 hr trend......15 degrees warmer. Min humidity........20-26 percent. 24 hr trend......23 percent drier. 20-foot winds.......South winds around 10 mph with higher gusts. Ridge top winds.....South around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 15 mph. Mixing Height.......2000-4000 ft agl until 1200, then 7000-9000 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....31-36. 24 hr trend......10 degrees warmer. Max humidity........51-57 percent. 24 hr trend......22 percent drier. Humidity recovery...Moderate. 20-foot winds.......Southeast winds around 10 mph with gusts to around 25 mph. Ridge top winds.....Southeast around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South around 15 mph. Mixing Height.......3800-5800 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Good until 2400, then poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms early in the afternoon. Chance of precipitation 20 percent. Chance of thunder...20 percent. Max temperature.....56-61. 24 hr trend......6 degrees warmer. Min humidity........21-27 percent. 24 hr trend......2 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2400-4400 ft agl until 1200, then 8000-10000 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Chance of showers and slight chance of thunderstorms in the evening, then chance of showers after midnight. Lows around 40. Northwest winds around 10 mph. .THURSDAY...Showers, slight chance of thunderstorms and snow showers. Lows in the mid 30s. Highs in the mid 50s. Northwest winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the mid 60s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the mid 70s. Winds generally less than 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs 80 to 85. $$ WYZ276-201230- Cody Foothills- Including the cities of Clark, Cody, and Meeteetse 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Slight chance of showers late in the afternoon. Chance of showers 20 percent. Chance of thunder...0 percent. Max temperature.....53-58. 24 hr trend......18 degrees warmer. Min humidity........20-26 percent. 24 hr trend......23 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200. Winds south around 10 mph after 1500. Gusts up to 15 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2800-4800 ft agl until 1200, then 8400-10400 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of showers early in the evening. Chance of showers 20 percent. Chance of thunder...0 percent. Min temperature.....33-38. 24 hr trend......11 degrees warmer. Max humidity........52-58 percent. 24 hr trend......19 percent drier. Humidity recovery...Moderate. 20-foot winds.......Southwest winds around 10 mph until 0300, then downslope/downvalley 4-7 mph. Gusts up to 20 mph. Ridge top winds.....Southwest around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 15 mph. Mixing Height.......3200-5200 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .WEDNESDAY... Sky/weather.........Partly cloudy then becoming mostly cloudy. Slight chance of showers early in the afternoon. Slight chance of thunderstorms in the afternoon. Chance of showers late in the afternoon. Chance of precipitation 50 percent. Chance of thunder...20 percent. Max temperature.....57-62. 24 hr trend......5 degrees warmer. Min humidity........27-33 percent. 24 hr trend......3 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph. Ridge top winds.....West around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......3400-5400 ft agl until 1200, then 6600-8600 ft agl. Smoke dispersal.....Fair to good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Cloudy. Chance of showers and slight chance of thunderstorms in the evening, then showers likely and slight chance of snow showers after midnight. Lows in the upper 30s. North winds around 10 mph. .THURSDAY...Showers, snow showers and slight chance of thunderstorms. Lows in the mid 30s. Highs in the lower 50s. Northwest winds around 10 mph. .FRIDAY...Warmer. Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 40s. Highs in the lower 60s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the upper 40s. Highs in the lower 70s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the lower 50s. Highs 75 to 80. $$ WYZ287-201230- Owl Creek Mountains- 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Mostly sunny. Chance of thunder...0 percent. Max temperature.....46-51. 24 hr trend......16 degrees warmer. Min humidity........26-32 percent. 24 hr trend......29 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 20 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......1800-3800 ft agl until 1200, then 5800-7800 ft agl. Smoke dispersal.....Poor until 1200, then good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....31-36. 24 hr trend......10 degrees warmer. Max humidity........57-63 percent. 24 hr trend......17 percent drier. Humidity recovery...Good. 20-foot winds.......Southwest winds 10 to 15 mph and gusty. Ridge top winds.....Southwest 15 to 20 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 15 to 20 mph. Mixing Height.......3000-5000 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Fair to good until 2400, then poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....51-56. 24 hr trend......7 degrees warmer. Min humidity........28-34 percent. 24 hr trend......1 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then south around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......3400-5400 ft agl until 1200, then 7800-9800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Chance of showers and snow showers after midnight. Lows in the upper 30s. Winds generally less than 10 mph. .THURSDAY...Showers, snow showers and slight chance of thunderstorms. Lows in the mid 30s. Highs in the upper 40s. Northwest winds around 10 mph. .FRIDAY...Warmer. Partly cloudy with slight chance of showers and thunderstorms. Lows around 40. Highs in the upper 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 40s. Highs in the upper 60s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 40s. Highs 71 to 76. $$ WYZ286-201230- Absaroka Mountains/North Shoshone NF- Including the city of Pahaska 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Slight chance of snow showers early in the afternoon. Chance of snow showers late in the afternoon. Chance of snow 50 percent. Chance of thunder...0 percent. Max temperature.....45-50. 24 hr trend......14 degrees warmer. Min humidity........29-35 percent. 24 hr trend......28 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 5800-7800 ft agl. Smoke dispersal.....Fair to good. .TONIGHT... Sky/weather.........Partly cloudy. Chance of snow showers early in the evening. Slight chance of snow showers early in the evening. Chance of snow 50 percent. Chance of thunder...0 percent. Min temperature.....27-32. 24 hr trend......11 degrees warmer. Max humidity........64-70 percent. 24 hr trend......15 percent drier. Humidity recovery...Good. 20-foot winds.......West winds around 10 mph until 2100, then downslope/downvalley 4-7 mph until 2400, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of snow showers in the morning, then chance of snow showers, showers and slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...20 percent. Max temperature.....46-51. 24 hr trend......2 degrees warmer. Min humidity........42-48 percent. 24 hr trend......8 percent wetter. 20-foot winds.......West winds around 10 mph with gusts to around 25 mph. Ridge top winds.....West around 15 mph. Chc of wetting rain.Less than 5 percent. Transport winds.....West 15 to 20 mph. Mixing Height.......3000-5000 ft agl until 1200, then 5600-7600 ft agl. Smoke dispersal.....Fair to good until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Chance of snow showers, showers and slight chance of thunderstorms in the evening, then snow showers and showers after midnight. Lows in the lower 30s. Winds generally less than 10 mph. .THURSDAY...Snow showers, slight chance of thunderstorms and showers. Lows in the mid 20s. Highs in the lower 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of showers, snow showers and slight chance of thunderstorms. Lows in the lower 30s. Highs in the upper 40s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the upper 30s. Highs in the upper 50s. West winds around 15 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows around 40. Highs 60 to 65. $$ WYZ140-201230- Yellowstone National Park- Including the cities of Lake, Mammoth, and Old Faithful 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of snow showers early in the afternoon. Chance of snow 20 percent. Chance of thunder...0 percent. Max temperature.....47-52. 24 hr trend......12 degrees warmer. Min humidity........26-32 percent. 24 hr trend......13 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2800-4800 ft agl until 1200, then 7000-9000 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of snow showers early in the evening. Chance of snow 20 percent. Chance of thunder...0 percent. Min temperature.....26-31. 24 hr trend......7 degrees warmer. Max humidity........71-77 percent. 24 hr trend......3 percent drier. Humidity recovery...Excellent. 20-foot winds.......West winds around 10 mph until 2100, then downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Poor to fair until 2400, then poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of snow showers in the morning, then showers likely with possible snow showers and thunderstorms in the afternoon. No snow accumulation. Chance of precipitation 70 percent. Chance of thunder...20 percent. Max temperature.....48-53. 24 hr trend......3 degrees warmer. Min humidity........39-45 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 0900, then southwest around 10 mph. Gusts up to 25 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Less than 5 percent. Transport winds.....Southwest 15 to 20 mph. Mixing Height.......2600-4600 ft agl until 1200, then 5800-7400 ft agl. Smoke dispersal.....Fair to good until 1200, then very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Showers, snow showers likely and slight chance of thunderstorms in the evening, then snow showers and slight chance of showers after midnight. Lows around 30. Winds generally less than 10 mph. .THURSDAY...Partly cloudy. Snow showers likely with possible showers and thunderstorms. Lows in the mid 20s. Highs in the mid 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of showers, slight chance of thunderstorms and snow showers. Lows around 30. Highs in the lower 50s. Winds generally less than 10 mph. .SATURDAY...Partly cloudy. Slight chance of showers and thunderstorms. Lows in the mid 30s. Highs in the upper 50s. Winds generally less than 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 30s. Highs 62 to 67. $$ WYZ415-201230- North Zone Bridger Teton NF and Grand Teton NP- Including the cities of Jackson and Moran 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....43-48. 24 hr trend......11 degrees warmer. Min humidity........30-36 percent. 24 hr trend......24 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph until 1200, then west. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west. Mixing Height.......2000-4000 ft agl until 1200, then 6200-8200 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....23-28. 24 hr trend......6 degrees warmer. Max humidity........72-78 percent. 24 hr trend......9 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph until 2400, then south. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......2600-4600 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of snow showers late in the morning. Slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 20 percent. Chance of thunder...20 percent. Max temperature.....48-53. 24 hr trend......3 degrees warmer. Min humidity........40-46 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 25 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west around 20 mph. Mixing Height.......2800-4800 ft agl until 1200, then 6000-7600 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Slight chance of showers, thunderstorms and snow showers in the evening, then snow showers and showers likely after midnight. Lows in the lower 30s. Winds generally less than 10 mph. .THURSDAY...Partly cloudy. Snow showers, showers and slight chance of thunderstorms. Lows in the upper 20s. Highs in the upper 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of snow showers, slight chance of showers and thunderstorms. Lows in the lower 30s. Highs in the lower 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 30s. Highs around 60. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 30s. Highs 63 to 68. $$ WYZ416-201230- West Wind River Mountains/East Zone Bridger Teton NF- 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Slight chance of snow showers late in the morning. Chance of snow showers late in the afternoon. Chance of snow 50 percent. Chance of thunder...0 percent. Max temperature.....39-44. 24 hr trend......10 degrees warmer. Min humidity........36-42 percent. 24 hr trend......15 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. 15 mph after 1200. Ridge top winds.....West around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing Height.......1400-3400 ft agl until 1200, then 4600-6600 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Partly cloudy. Chance of snow showers early in the evening. Slight chance of snow showers early in the evening. Chance of snow 40 percent. Chance of thunder...0 percent. Min temperature.....20-25. 24 hr trend......5 degrees warmer. Max humidity........75-81 percent. 24 hr trend......11 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....West around 10 mph until 2400, then east. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph until 2400, then southeast. Mixing Height.......2000-4000 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of thunderstorms and snow showers in the afternoon. Slight chance of showers late in the afternoon. Chance of precipitation 20 percent. Chance of thunder...20 percent. Max temperature.....42-47. 24 hr trend......4 degrees warmer. Min humidity........46-52 percent. 24 hr trend......6 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 20 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......2400-4400 ft agl until 1200, then 4600-6600 ft agl. Smoke dispersal.....Fair to good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Chance of snow showers after midnight. Lows in the upper 20s. Winds generally less than 10 mph. .THURSDAY...Mostly cloudy. Snow showers, chance of thunderstorms and showers. Lows in the mid 20s. Highs in the lower 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of snow showers, showers and slight chance of thunderstorms. Lows in the upper 20s. Highs in the upper 40s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the lower 30s. Highs in the mid 50s. West winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 30s. Highs 58 to 63. $$ WYZ288-201230- East Wind River Mountains/South Shoshone NF- Including the cities of Dubois and South Pass 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Slight chance of snow showers early in the afternoon. Chance of snow showers early in the afternoon. Chance of snow 50 percent. Chance of thunder...0 percent. Max temperature.....39-44. 24 hr trend......11 degrees warmer. Min humidity........40-46 percent. 24 hr trend......29 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph. Ridge top winds.....West around 10 mph until 1200, then south. Chc of wetting rain.Less than 5 percent. Transport winds.....West around 10 mph. Mixing Height.......1200-3200 ft agl until 1200, then 3400-5400 ft agl. Smoke dispersal.....Poor. .TONIGHT... Sky/weather.........Partly cloudy. Slight chance of snow showers early in the evening. Chance of snow 20 percent. Chance of thunder...0 percent. Min temperature.....21-26. 24 hr trend......9 degrees warmer. Max humidity........73-79 percent. 24 hr trend......18 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then west around 10 mph. Gusts up to 15 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 15 mph. Mixing Height.......1400-3400 ft agl until 2400, then 600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of thunderstorms and snow showers in the afternoon. Chance of precipitation 20 percent. Chance of thunder...0 percent. Max temperature.....44-49. 24 hr trend......5 degrees warmer. Min humidity........45-51 percent. 24 hr trend......1 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 25 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 15 to 20 mph. Mixing Height.......2400-4400 ft agl until 1200, then 4600-6600 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Chance of snow showers after midnight. Lows in the lower 30s. Southwest winds around 10 mph. .THURSDAY...Snow showers, showers and slight chance of thunderstorms. Lows in the mid 20s. Highs in the lower 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of snow showers, slight chance of showers and thunderstorms. Lows in the lower 30s. Highs around 50. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the upper 30s. Highs in the upper 50s. West winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows around 40. Highs 61 to 66. $$ WYZ414-201230- Salt and Wyoming Ranges/West Zone Bridger Teton NF- Including the city of Afton 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Chance of snow showers, slight chance of showers and thunderstorms in the afternoon. Chance of precipitation 50 percent. Chance of thunder...10 percent. Max temperature.....42-47. 24 hr trend......11 degrees warmer. Min humidity........35-41 percent. 24 hr trend......30 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 15 mph. Ridge top winds.....Southeast around 5 mph until 1200, then west. Chc of wetting rain.Zero percent. Transport winds.....East around 5 mph until 1200, then northwest. Mixing Height.......1800-3800 ft agl until 1200, then 6200-8200 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Partly cloudy. Chance of snow showers and slight chance of showers early in the evening. Slight chance of snow showers early in the evening. Chance of precipitation 40 percent. Chance of thunder...0 percent. Min temperature.....25-30. 24 hr trend......6 degrees warmer. Max humidity........74-80 percent. 24 hr trend......17 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....Southwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......2400-4400 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of showers, thunderstorms and snow showers in the afternoon. Chance of precipitation 20 percent. Chance of thunder...10 percent. Max temperature.....48-53. 24 hr trend......5 degrees warmer. Min humidity........41-47 percent. 24 hr trend......5 percent wetter. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 25 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 1200, then west around 20 mph. Mixing Height.......2600-4600 ft agl until 1200, then 5800-7800 ft agl. Smoke dispersal.....Poor to fair until 1200, then good to very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Slight chance of showers and thunderstorms in the evening, then chance of snow showers and showers after midnight. Lows in the lower 30s. Winds generally less than 10 mph. .THURSDAY...Partly cloudy. Snow showers with possible showers and thunderstorms likely. Lows around 30. Highs in the upper 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers, thunderstorms and snow showers. Lows in the lower 30s. Highs in the mid 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the upper 30s. Highs in the lower 60s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 30s. Highs 65 to 70. $$ WYZ278-201230- Upper Green River Basin/Rock Springs BLM- Including the cities of Big Piney, Farson, and Pinedale 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....42-47. 24 hr trend......12 degrees warmer. Min humidity........38-44 percent. 24 hr trend......33 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Gusts up to 10 mph. Ridge top winds.....Northwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Northwest around 10 mph. Mixing Height.......1200-3200 ft agl until 1200, then 4400-6400 ft agl. Smoke dispersal.....Poor to fair. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....22-27. 24 hr trend......4 degrees warmer. Max humidity........78-84 percent. 24 hr trend......14 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 10 mph. Ridge top winds.....West around 10 mph until 2400, then northeast. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph until 2400, then east. Mixing Height.......2600-4600 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Slight chance of showers and thunderstorms early in the afternoon. Chance of precipitation 20 percent. Chance of thunder...0 percent. Max temperature.....48-53. 24 hr trend......7 degrees warmer. Min humidity........36-42 percent. 24 hr trend......Unchanged. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then west around 10 mph. Gusts up to 20 mph. Ridge top winds.....West 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......2200-4200 ft agl until 1200, then 7000-8800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Slight chance of showers and snow showers after midnight. Lows around 30. Winds generally less than 10 mph. .THURSDAY...Partly cloudy. Showers, snow showers likely and chance of thunderstorms. Lows in the upper 20s. Highs in the mid 50s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows around 30. Highs in the upper 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the mid 30s. Highs in the mid 60s. West winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 30s. Highs 70 to 75. $$ WYZ277-201230- Lincoln and Uinta Counties/Lower Elevations- Including the cities of Evanston, Fort Bridger, and Kemmerer 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....44-49. 24 hr trend......14 degrees warmer. Min humidity........37-43 percent. 24 hr trend......45 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....East 5 to 10 mph. Chc of wetting rain.Zero percent. Transport winds.....East around 10 mph until 1200, then north. Mixing Height.......1200-3200 ft agl until 1200, then 4400-6400 ft agl. Smoke dispersal.....Poor. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....25-30. 24 hr trend......6 degrees warmer. Max humidity........72-78 percent. 24 hr trend......22 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Ridge top winds.....West around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......2600-4600 ft agl until 2400, then 400-600 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....50-55. 24 hr trend......7 degrees warmer. Min humidity........35-41 percent. 24 hr trend......Unchanged. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west around 10 mph with higher gusts. Ridge top winds.....Southwest around 5 mph until 1200, then west around 15 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......2400-4400 ft agl until 1200, then 7600-8800 ft agl. Smoke dispersal.....Poor to fair until 1200, then very good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly cloudy. Lows in the lower 30s. Winds generally less than 10 mph. .THURSDAY...Partly cloudy with showers, snow showers likely and chance of thunderstorms. Lows around 30. Highs in the mid 50s. Northwest winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the lower 30s. Highs in the upper 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the upper 30s. Highs in the mid 60s. West winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the upper 30s. Highs 70 to 75. $$ WYZ279-201230- Sweetwater County/Rock Springs BLM/Flaming Gorge NRA- Including the cities of Green River, Rock Springs, and Wamsutter 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy. Patchy fog early in the morning. Chance of thunder...0 percent. Max temperature.....42-47. 24 hr trend......13 degrees warmer. Min humidity........47-53 percent. 24 hr trend......28 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....Northeast around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....North around 10 mph. Mixing Height.......600-2600 ft agl until 1200, then 2600-4600 ft agl. Smoke dispersal.....Poor. .TONIGHT... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Min temperature.....21-26. 24 hr trend......5 degrees warmer. Max humidity........81-87 percent. 24 hr trend......15 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph. Gusts up to 10 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......1600-3600 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Partly cloudy. Chance of thunder...0 percent. Max temperature.....48-53. 24 hr trend......6 degrees warmer. Min humidity........44-50 percent. 24 hr trend......9 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1500, then west around 10 mph with higher gusts. Ridge top winds.....Southwest 5 to 10 mph. Chc of wetting rain.Zero percent. Transport winds.....West 10 to 15 mph. Mixing Height.......1600-3600 ft agl until 1200, then 5200-7200 ft agl. Smoke dispersal.....Poor until 1200, then good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 30s. Winds generally less than 10 mph. .THURSDAY...Partly cloudy. Showers likely with possible thunderstorms and snow showers. Lows in the lower 30s. Highs in the mid 50s. Northwest winds around 10 mph. .FRIDAY...Partly cloudy with slight chance of showers and thunderstorms. Lows in the mid 30s. Highs in the upper 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the upper 30s. Highs in the upper 60s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs 71 to 76. $$ WYZ289-201230- Granite/Green/Ferris/Rattlesnake Mountains- Including the city of Jeffrey City 416 AM MDT Tue May 19 2026 ...FREEZE WARNING IN EFFECT UNTIL 9 AM MDT THIS MORNING... .TODAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Patchy fog early in the morning. Chance of thunder...0 percent. Max temperature.....40-45. 24 hr trend......13 degrees warmer. Min humidity........48-54 percent. 24 hr trend......30 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....Southwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest around 10 mph. Mixing Height.......1200-3200 ft agl. Smoke dispersal.....Poor. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....21-26. 24 hr trend......7 degrees warmer. Max humidity........78-84 percent. 24 hr trend......17 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then south around 10 mph until 2400, then downslope/downvalley 4-7 mph. Gusts up to 15 mph. Ridge top winds.....South around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......800-2800 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....43-48. 24 hr trend......3 degrees warmer. Min humidity........46-52 percent. 24 hr trend......3 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 10 to 15 mph. Mixing Height.......2400-4400 ft agl. Smoke dispersal.....Poor to fair. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Partly cloudy. Lows in the lower 30s. Winds generally less than 10 mph. .THURSDAY...Mostly cloudy with showers likely with possible snow showers and thunderstorms. Lows around 30. Highs in the upper 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with slight chance of showers, thunderstorms and snow showers. Lows in the mid 30s. Highs in the mid 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows around 40. Highs in the mid 60s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the lower 40s. Highs 70 to 75. $$ WYZ300-201230- Casper Mountain- 416 AM MDT Tue May 19 2026 .TODAY... Sky/weather.........Partly cloudy then becoming mostly sunny. Patchy fog early in the morning. Chance of thunder...0 percent. Max temperature.....40-45. 24 hr trend......12 degrees warmer. Min humidity........50-56 percent. 24 hr trend......38 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph. Ridge top winds.....Southwest around 10 mph. Chc of wetting rain.Zero percent. Transport winds.....West around 10 mph. Mixing Height.......400-2200 ft agl until 1200, then 2400-3400 ft agl. Smoke dispersal.....Poor. .TONIGHT... Sky/weather.........Mostly clear. Chance of thunder...0 percent. Min temperature.....24-29. 24 hr trend......7 degrees warmer. Max humidity........83-89 percent. 24 hr trend......11 percent drier. Humidity recovery...Excellent. 20-foot winds.......Downslope/downvalley 4-7 mph until 2100, then south around 10 mph. Gusts up to 15 mph. Ridge top winds.....South 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....South 10 to 15 mph. Mixing Height.......800-2800 ft agl until 2400, then 400 ft agl. Smoke dispersal.....Poor. .WEDNESDAY... Sky/weather.........Mostly sunny then becoming partly cloudy. Chance of thunder...0 percent. Max temperature.....46-51. 24 hr trend......5 degrees warmer. Min humidity........43-49 percent. 24 hr trend......6 percent drier. 20-foot winds.......Upslope/upvalley 5-9 mph until 1200, then southwest around 10 mph. Gusts up to 20 mph. Ridge top winds.....Southwest 10 to 15 mph. Chc of wetting rain.Zero percent. Transport winds.....Southwest 15 to 20 mph. Mixing Height.......1000-3000 ft agl until 1200, then 3800-5800 ft agl. Smoke dispersal.....Poor until 1200, then good. .Forecast days 3 through 7...... .WEDNESDAY NIGHT...Mostly clear. Lows around 30. Winds generally less than 10 mph. .THURSDAY...Mostly cloudy with showers likely, chance of thunderstorms and snow showers. Lows in the lower 30s. Highs in the upper 40s. Winds generally less than 10 mph. .FRIDAY...Partly cloudy with chance of showers, snow showers and slight chance of thunderstorms. Lows in the mid 30s. Highs in the lower 50s. Winds generally less than 10 mph. .SATURDAY...Mostly clear. Lows in the lower 40s. Highs in the lower 60s. Southwest winds around 10 mph. .SUNDAY THROUGH MEMORIAL DAY...Mostly clear. Lows in the mid 40s. Highs 68 to 73. $$