FNUS75 KRIW 231351 FWSRIW Spot Forecast for BEAR...USFWS National Weather Service Riverton WY 751 AM MDT Sun Aug 23 2026 Forecast is based on forecast start time of 0800 MDT on August 23. If conditions become unrepresentative, contact the National Weather Service .DISCUSSION... Mostly sunny and dry through the morning and early afternoon hours. Increasing storm chances after 1400 through about 2000 but isolated in nature (~20% coverage). Gusty outflow winds and lightning the main threats. Otherwise, partly cloudy skies and temperatures pushing into the low 70s in the afternoon. Minimum relative humidity values down to near 30 percent with good recovery overnight. Light winds increase after 1000 out of the west 10 to 15 mph with gusts up to 25 mph during the afternoon hours between 1200 and 1800. Winds become light once again after 2000. Mixing and smoke dispersal will be poor during the morning and overnight hours with very good conditions with the breezy westerly winds. ...Thunderstorms imply strong gusty and erratic winds... .REST OF TODAY... Sky/weather.........Mostly sunny (25-35 percent). Slight chance of showers and thunderstorms late in the afternoon. CWR.................0 percent. Chance of pcpn......20 percent. Chance of thunder...20 percent. Max temperature.....Around 71. Min humidity........30 percent. Wind (20 ft)........Light winds until 1000, then west 10 to 15 mph with gusts to around 25 mph. Gusty and erratic winds expected near thunderstorms late in the afternoon. Ridgetop wind.......West 10 to 15 mph until 1000, then around 25 mph. Mixing height.......1500 ft AGL until 1000, then 4000 ft AGL until 1200, then 7500 ft AGL until 1400, then 9500 ft AGL until 1700, then 7000 ft AGL. Transport winds.....West 15 to 25 mph. Smoke dispersal.....Poor until 1000, then very good. TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........35 25 15 15 15 25 30 35 30 40 Weather cov..... SCH SCH SCH SCH Weather type.... RW RW RW RW Tstm cov........ SCH SCH SCH SCH CWR.............0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 10 10 20 20 20 20 Chc of thdr (%).0 0 0 0 10 10 20 20 20 20 Temp............55 59 63 66 67 69 69 70 70 70 RH..............69 62 52 48 43 39 35 33 31 31 20 FT wind dir..NW W W W W W W W W W 20 FT wind spd..6 6 8 10 11 11 12 12 12 12 20 FT wind gust.12 13 17 18 19 21 22 23 22 23 Ridge wind dir..NW W W W W W W W W W Ridge wind spd..10 15 15 15 20 20 20 20 20 20 Mix hgt (kft)...0.5 1.5 3.0 4.0 6.0 7.5 8.5 9.5 9.5 7.0 Transp wind dir.W W W W W W W W W W Transp wind spd.13 15 17 18 20 21 21 21 22 22 SDspl kt-ft/10007 21 43 68 102 132 156 167 184 137 .TONIGHT... Sky/weather.........Partly cloudy (40-50 percent). Slight chance of showers and thunderstorms early in the evening. CWR.................0 percent. Chance of pcpn......15 percent. Chance of thunder...15 percent. Min temperature.....Around 41. Max humidity........81 percent. Wind (20 ft)........West winds 10 to 15 mph with gusts to around 20 mph until 2000, then light. Gusty and erratic winds expected near thunderstorms early in the evening. Ridgetop wind.......West 15 to 20 mph until 2000, then northwest around 10 mph. Mixing height.......6000 ft AGL until 1900. 500 ft AGL after 2000. Transport winds.....West 12 to 20 mph until 2400, then 10 to 12 mph. Smoke dispersal.....Very good until 2000, then poor. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........45 55 50 45 60 50 30 35 30 35 40 45 Weather cov.....SCH SCH SCH Weather type....RW RW RW Tstm cov........SCH SCH SCH CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).20 20 20 0 0 0 0 0 0 0 0 0 Chc of thdr (%).20 20 20 0 0 0 0 0 0 0 0 0 Temp............69 64 59 54 51 49 47 45 45 45 43 43 RH..............30 37 47 57 64 68 72 77 75 77 79 81 20 FT wind dir..W W W W W W NW NW W NW NW NW 20 FT wind spd..12 9 6 6 6 6 5 5 5 5 5 4 20 FT wind gust.22 18 14 12 10 10 10 10 10 10 10 8 Ridge wind dir..W W W W W W NW NW W NW NW NW Ridge wind spd..20 15 15 15 10 10 10 10 10 10 10 10 Mix hgt (kft)...6.0 4.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Transp wind dir.W W W W W W W W W W W W Transp wind spd.20 17 13 13 12 12 10 10 10 12 10 10 SDspl kt-ft/1000101 61 7 7 6 6 5 5 5 6 5 5 .MONDAY... Sky/weather.........Mostly sunny (40-50 percent). Slight chance of showers and thunderstorms early in the afternoon. Chance of showers and thunderstorms late in the afternoon. CWR.................5 percent. Chance of pcpn......40 percent. Chance of thunder...40 percent. Max temperature.....Around 70. Min humidity........33 percent. Wind (20 ft)........Light winds until 1000, then west 10 to 15 mph with gusts to around 20 mph. Gusty and erratic winds expected near thunderstorms late in the afternoon. Ridgetop wind.......West 10 to 15 mph until 1000, then 15 to 20 mph. Mixing height.......2000 ft AGL until 1000, then 4000 ft AGL until 1100, then 7500 ft AGL until 1300, then 8500 ft AGL until 1700, then 6500 ft AGL. Transport winds.....West 10 to 15 mph until 1000, then 15 to 20 mph. Smoke dispersal.....Poor until 1000, then very good. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........45 60 50 35 40 25 35 40 50 65 80 60 Weather cov..... SCH SCH CHC CHC Weather type.... RW RW RW RW Tstm cov........ SCH SCH CHC CHC CWR.............0 0 0 0 0 0 10 10 10 10 10 10 Chc of pcpn (%).0 0 0 0 0 0 0 10 10 20 30 40 Chc of thdr (%).0 0 0 0 0 0 0 10 10 20 30 30 Temp............42 41 46 53 62 65 67 68 67 69 66 66 RH..............79 81 70 56 42 37 33 32 32 32 32 33 20 FT wind dir..NW N NW W W W W W W W NW W 20 FT wind spd..4 4 4 5 6 9 10 11 11 11 10 10 20 FT wind gust.7 7 10 11 14 17 19 20 20 20 19 19 Ridge wind dir..NW N NW W W W W W W W NW W Ridge wind spd..10 10 10 10 15 15 15 20 20 20 15 15 Mix hgt (kft)...0.5 0.5 1.0 2.0 4.0 6.0 7.5 8.5 8.0 8.0 7.0 6.5 Transp wind dir.W W W W W W W W W W W W Transp wind spd.10 10 9 12 16 18 21 22 21 21 20 17 SDspl kt-ft/10005 5 7 21 55 93 133 161 146 142 117 95 .FORECAST DAYS 3 THROUGH 5... .TUESDAY... Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 30s. Highs in the upper 60s. Light winds. .WEDNESDAY... Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 30s. Highs around 70. Light winds. .THURSDAY... Partly cloudy. Chance of showers and thunderstorms. Lows around 40. Highs around 70. Light winds. $$ Forecaster...Lowe Requested by...BLAKE DAVISON Type of request...WILDFIRE .TAG 2620300.0/RIW .DELDT 08/23/26 .FormatterVersion 2.0.0 .EMAIL wycdc@firenet.gov,blake.davison@usda.gov,roseberrynicholas@gmail.com