Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
010
FNUS75 KRIW 081123
FWSRIW
Spot Forecast for Horse...USFS
National Weather Service Riverton WY
523 AM MDT Fri Aug 8 2025
Forecast is based on forecast start time of 0600 MDT on August 08.
If conditions become unrepresentative, contact the National Weather
Service
...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT THIS EVENING...
.DISCUSSION...
Temperatures will be about 10 degrees cooler than yesterday
following the passage of a cold front. Clouds that are around in
the morning will give way to a mainly sunny sky by 1200. A
gusty west wind will continue through the day with wind gusts
of 25 to 30 mph expected, with the strongest gusts between 1200
and 1800. Relative humidity will be around 3 degrees higher than
on Thursday. Mixing and smoke dispersal will be excellent after
1200.
Humidity recover will remain poor tonight. however, wind should
become light and largely terrain driven after sunset. Tomorrow
will see wind about 5 to 10 mph lighter than today with similar
levels of humidity and temperatures.
...Thunderstorms imply strong gusty and erratic winds...
.TODAY...
Sky/weather.........Partly sunny (45-55 percent) then becoming
sunny (5 to 15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...2 percent.
Max temperature.....Around 64.
Min humidity........20 percent.
Wind (20 ft)........West winds 11 to 16 mph with gusts to around 24
mph.
Ridgetop wind.......West 20 to 25 mph.
Mixing height.......500 ft AGL until 0900. 7500 ft AGL after 1500.
Transport winds.....West 18 to 26 mph.
Smoke dispersal.....Poor until 0900, becoming excellent after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........50 45 45 40 30 15 5 5 10 10 10 10
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............46 46 49 52 55 58 60 63 64 64 64 64
RH..............58 56 53 49 42 37 33 30 27 23 21 20
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..11 12 13 13 14 14 14 15 15 16 16 15
20 FT wind gust.17 18 19 19 21 21 21 22 22 24 24 22
Ridge wind dir..W W W W W W W W W W W W
Ridge wind spd..20 20 20 20 20 20 20 20 25 25 25 25
Mix hgt (kft)...0.5 0.5 0.5 3.0 4.0 4.5 5.5 6.5 7.0 7.5 7.5 7.0
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.18 20 21 22 22 23 25 26 25 25 25 25
SDspl kt-ft/10009 10 11 55 74 94 126 153 156 168 163 156
.TONIGHT...
Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 38.
Max humidity........39 percent.
Wind (20 ft)........Northwest winds 7 to 14 mph with gusts to
around 21 mph until 2200, then light.
Ridgetop wind.......Northwest 20 to 25 mph until 2100, then 10 to
15 mph.
Mixing height.......5000 ft AGL until 2000, then 500 ft AGL.
Transport winds.....West 14 to 23 mph until 2200, then 9 to 13 mph.
Smoke dispersal.....Very good early, then becoming poor after
2100.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10 15 20 10 15 10 5 10 10 15 20 20
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............63 63 60 52 47 45 42 43 41 41 39 39
RH..............20 21 23 29 32 33 34 35 36 36 38 38
20 FT wind dir..NW NW NW NW NW W W W W W W W
20 FT wind spd..14 13 11 7 6 6 5 4 4 5 5 5
20 FT wind gust.21 19 17 11 10 10 7 6 6 7 7 7
Ridge wind dir..W NW NW NW NW W W W W W W W
Ridge wind spd..25 20 20 15 15 15 10 10 10 10 10 10
Mix hgt (kft)...6.0 5.0 2.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W W NW NW NW W W W W W W W
Transp wind spd.23 22 18 14 13 13 10 9 9 10 10 10
SDspl kt-ft/1000123 97 28 7 6 6 5 5 5 5 5 5
.SATURDAY...
Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 63.
Min humidity........21 percent.
Wind (20 ft)........Light winds until 1100, then west 7 to 10 mph
with gusts to around 16 mph.
Ridgetop wind.......West 10 to 15 mph.
Mixing height.......500 ft AGL until 0900. 8000 ft AGL after 1400.
Transport winds.....West 10 to 17 mph.
Smoke dispersal.....Poor until 0900, becoming very good after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........40 60 60 50 55 60 60 65 65 70 60 55
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............38 39 44 50 54 56 58 60 62 63 63 63
RH..............39 38 36 31 27 25 23 22 21 21 21 22
20 FT wind dir..W W W W W W W W W W W NW
20 FT wind spd..5 5 5 5 6 7 8 9 10 10 10 10
20 FT wind gust.7 7 7 7 8 11 13 14 16 16 16 16
Ridge wind dir..W W W W W W W W W W W NW
Ridge wind spd..10 10 10 10 10 15 15 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 0.5 2.5 4.0 5.0 5.5 6.5 7.5 8.0 8.0 8.0
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.10 10 10 10 12 14 15 16 17 17 17 17
SDspl kt-ft/10005 5 7 21 40 58 74 91 110 122 119 117
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...
Mostly clear. Lows in the lower 40s. Highs in the upper 60s.
Light winds.
.MONDAY...
Mostly clear. Lows in the mid 40s. Highs in the mid 70s. Light
winds.
.TUESDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 70s. West
winds around 8 mph.
$$
Forecaster...Hattings
Requested by...Cody Norton
Type of request...WILDFIRE
.TAG 2519241.3/RIW
.DELDT 08/08/25
.FormatterVersion 2.0.0
.EMAIL cody.norton@usda.gov