FNUS75 KRIW 221822 FWSRIW Spot Forecast for McDougal Pass...USFS National Weather Service Riverton WY 1222 PM MDT Sat Aug 22 2026 Forecast is based on forecast start time of 1300 MDT on August 22. If conditions become unrepresentative, contact the National Weather Service .DISCUSSION... Currently clear on radar as any shower activity has pushed east, but another round is pushing out of Idaho by 17-1800. Scattered rain showers and a few isolated thunderstorms likely (30% coverage). Gusty outflow winds and lightning the main hazards through about 2100. Mostly cloudy skies remain into the overnight hours with a bit more sun for Sunday. Southwest to west winds around 10 to 15 mph through the afternoon and evening becoming light and more southerly by 2200. As such, mixing and smoke dispersal will be good until that point before becoming poor there after into the overnight hours. Temperatures about 8 to 10 degrees cooler than Friday, with minimum relative humidity values down to 35 to 40 percent with good recovery overnight with the passing shower activity. More isolated in nature for storm coverage Sunday afternoon and early evening. ...Thunderstorms imply strong gusty and erratic winds... .REST OF TODAY... Sky/weather.........Partly sunny (50-60 percent). Chance of showers and thunderstorms. CWR.................0 percent. Chance of pcpn......30 percent. Chance of thunder...25 percent. Max temperature.....Around 79. Min humidity........35 percent. Wind (20 ft)........Southwest winds 10 to 15 mph. Gusty and erratic winds expected near thunderstorms. Ridgetop wind.......West around 15 mph. Mixing height.......7000 ft AGL. Transport winds.....West 15 to 20 mph. Smoke dispersal.....Good. TIME (MDT) 1PM 2PM 3PM 4PM 5PM Sky (%).........55 65 55 55 40 Weather cov.....SCH SCH CHC SCH CHC Weather type....RW RW RW RW RW Tstm cov........SCH SCH CHC SCH CHC CWR.............0 0 0 0 0 Chc of pcpn (%).20 20 30 20 30 Chc of thdr (%).20 20 30 20 30 Temp............70 71 71 70 70 RH..............39 39 38 36 36 20 FT wind dir..SW SW W W W 20 FT wind spd..8 9 8 8 8 20 FT wind gust.14 14 14 14 14 Ridge wind dir..SW SW W W W Ridge wind spd..15 15 15 15 15 Mix hgt (kft)...7.0 6.5 6.5 7.0 6.5 Transp wind dir.W W W W W Transp wind spd.15 16 16 17 16 SDspl kt-ft/100092 91 90 107 91 .TONIGHT... Sky/weather.........Mostly cloudy (55-65 percent) then becoming partly cloudy (40-50 percent) then becoming mostly cloudy (65-75 percent). Chance of showers and thunderstorms early in the evening. CWR.................1 percent. Chance of pcpn......50 percent. Chance of thunder...26 percent. Min temperature.....Around 49. Max humidity........84 percent. Wind (20 ft)........West winds around 5 to 10 mph. Ridgetop wind.......West around 10 to 15 mph until 2200, then southwest. Mixing height.......4500 ft AGL until 1900, then 500 ft AGL. Transport winds.....West 10 to 15 mph until 2200, then south. Smoke dispersal.....Good until 2200, then poor. TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........55 60 60 35 50 55 60 65 80 70 75 70 Weather cov.....CHC CHC CHC SCH Weather type....RW RW RW RW Tstm cov........CHC CHC CHC SCH CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).50 40 30 10 10 0 10 10 10 10 10 10 Chc of thdr (%).30 30 30 10 10 0 10 10 10 10 10 10 Temp............67 64 60 56 54 52 52 53 54 53 52 52 RH..............39 45 53 64 66 71 71 78 75 73 76 76 20 FT wind dir..W W W W W SW SW SW SW SW SW SW 20 FT wind spd..7 6 6 7 7 6 6 6 6 6 6 6 20 FT wind gust.13 11 10 13 13 11 10 10 10 10 10 10 Ridge wind dir..W W S W S SW SW S S SW S SW Ridge wind spd..15 15 15 15 15 15 10 10 10 15 15 15 Mix hgt (kft)...4.5 1.5 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 S S S SW S S Transp wind spd.16 16 14 15 14 13 12 12 12 13 13 13 SDspl kt-ft/100060 18 7 7 6 6 5 5 6 6 6 6 .SUNDAY... Sky/weather.........Mostly sunny (25-35 percent). Slight chance of showers and thunderstorms early in the afternoon. Chance of showers and thunderstorms late in the afternoon. CWR.................0 percent increasing to 15 percent in the afternoon. Chance of pcpn......40 percent. Chance of thunder...33 percent. Max temperature.....Around 74. Min humidity........43 percent. Wind (20 ft)........Light winds until 1100, then west 10 to 15 mph with gusts to around 20 mph. Gusty and erratic winds expected near thunderstorms in the afternoon. Ridgetop wind.......Southwest 10 to 15 mph until 1100, then west around 20 mph. Mixing height.......1500 ft AGL until 1000, then 8000 ft by 1400, then 3000 ft AGL by 1700. Transport winds.....West 15 to 30 mph. Smoke dispersal.....Poor until 1100, then good. TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........55 45 40 25 10 10 5 15 30 35 30 45 Weather cov..... SCH SCH SCH SCH CHC CHC Weather type.... RW RW RW RW RW RW Tstm cov........ SCH SCH SCH SCH CHC CHC CWR.............0 0 0 0 0 0 20 20 20 20 20 20 Chc of pcpn (%).10 0 0 0 0 0 20 20 20 20 40 40 Chc of thdr (%).10 0 0 0 0 0 20 20 20 20 30 30 Temp............51 49 52 56 63 66 70 70 70 72 69 68 RH..............78 84 79 69 57 48 42 45 43 43 43 45 20 FT wind dir..SW SW SW SW W W W W W W W NW 20 FT wind spd..6 6 6 6 6 9 10 11 11 11 12 11 20 FT wind gust.10 10 10 10 12 14 18 18 20 20 20 18 Ridge wind dir..SW SW SW SW SW W W W W W W W Ridge wind spd..10 10 10 10 15 15 15 15 20 20 20 20 Mix hgt (kft)...0.5 0.5 0.5 1.5 3.0 5.5 7.5 8.0 5.0 6.0 3.0 5.5 Transp wind dir.SW S SW W W W W W W W W W Transp wind spd.12 12 12 12 13 15 16 17 18 18 18 18 SDspl kt-ft/10006 6 6 16 35 70 102 120 84 96 49 91 .FORECAST DAYS 3 THROUGH 5... .MONDAY... Partly cloudy. Chance of showers and thunderstorms. Lows in the upper 40s. Highs in the lower 70s. Light winds. .TUESDAY... Partly cloudy. Slight chance of showers and thunderstorms. Lows in the upper 40s. Highs in the mid 70s. Light winds. .WEDNESDAY... Partly cloudy. Lows in the upper 40s. Highs in the mid 70s. Light winds. $$ Forecaster...Lowe Requested by...Teton Fire Dispatch Type of request...WILDFIRE .TAG 2620243.0/RIW .DELDT 08/22/26 .FormatterVersion 2.0.0 .EMAIL wytdc@firenet.gov