Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
321
FNUS75 KRIW 051107
FWSRIW
Spot Forecast for Horse...USFS
National Weather Service Riverton WY
507 AM MDT Tue Aug 5 2025
Forecast is based on forecast start time of 0600 MDT on August 05.
If conditions become unrepresentative, contact the National Weather
Service
...RED FLAG WARNING IN EFFECT UNTIL 8 PM MDT FRIDAY...
.DISCUSSION...
Elevated to critical fire weather conditions are expected today.
Wind will continue to be gusty, with frequent gusts over 20 mph,
especially after 1200.There will be some clouds around this
morning but then sky will clear through the day. Humidity will
be slightly higher today, falling to around 20 percent in the
afternoon. Relative humidity recovery will be poor tonight,
struggling to each 40 percent. Wind should become light and
terrain driven after 2100 tonight.
Humidity will be around 5 percent lower on Wednesday, falling
close to 15 percent. Wind should average around 5 mph lighter
through. Elevated to critical fire weather conditions will
continue through Friday. No precipitation is expected through
at least Thursday night. An isolated shower or thunderstorm
may occur Friday the chance of wetting rain remains close to
zero.
...Thunderstorms imply strong gusty and erratic winds...
.TODAY...
Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 71.
Min humidity........21 percent.
Wind (20 ft)........Light winds until 0900, then west 7 to 14 mph
with gusts to around 21 mph.
Ridgetop wind.......West 15 to 20 mph.
Mixing height.......500 ft AGL until 0900. 9500 ft AGL after 1300.
Transport winds.....West 13 to 20 mph until 1200, then 23 to 25
mph.
Smoke dispersal.....Poor until 0900. Excellent after 1500.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........35 30 25 20 15 5 0 5 5 5 5 5
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............45 45 50 57 60 64 65 69 70 71 71 70
RH..............53 55 52 41 38 35 30 29 26 24 23 23
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..6 6 6 7 9 10 12 13 13 14 13 13
20 FT wind gust.10 10 10 11 14 16 18 19 19 21 19 19
Ridge wind dir..W W W W W W W W W W W W
Ridge wind spd..15 15 15 15 15 15 20 20 20 20 20 20
Mix hgt (kft)...0.5 0.5 0.5 3.0 4.5 6.0 7.0 8.0 8.5 9.0 9.5 9.5
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.13 13 13 14 16 20 24 23 23 25 24 24
SDspl kt-ft/10006 6 7 36 66 102 150 160 172 201 197 197
.TONIGHT...
Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 48.
Max humidity........37 percent.
Wind (20 ft)........West winds 7 to 12 mph with gusts to around 18
mph until 2100, then light.
Ridgetop wind.......West 15 to 20 mph until 2100, then around 10
mph.
Mixing height.......7000 ft AGL until 2000, then 500 ft AGL.
Transport winds.....West 14 to 21 mph until 2100, then 8 to 10 mph
until 0200, then south 9 to 10 mph.
Smoke dispersal.....Excellent early in the evening, decreasing to
poor after 2100.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10 10 20 20 20 15 10 10 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............70 69 66 61 56 53 51 50 50 49 49 49
RH..............24 25 27 31 34 35 36 36 36 36 37 35
20 FT wind dir..W W W W W W W W SW SW SW SW
20 FT wind spd..12 9 7 5 4 3 3 3 4 4 4 5
20 FT wind gust.18 14 11 7 6 6 6 6 7
Ridge wind dir..W W W W W W W W SW SW SW SW
Ridge wind spd..20 15 15 10 10 10 10 10 10 10 10 10
Mix hgt (kft)...8.5 7.0 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 NW NW NW SW S S S S
Transp wind spd.21 18 14 10 9 8 8 8 9 9 9 10
SDspl kt-ft/1000154 115 8 5 5 4 4 4 5 5 5 5
.WEDNESDAY...
Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 76.
Min humidity........16 percent.
Wind (20 ft)........Light winds until 1200, then southwest 8 to 11
mph with gusts to around 17 mph.
Ridgetop wind.......Southwest 10 to 15 mph until 1500, then west
around 20 mph.
Mixing height.......1500 ft AGL until 1000. 11500 ft AGL after
1200.
Transport winds.....South around 10 mph until 1000, then west 15 to
22 mph.
Smoke dispersal.....Poor until 1000. Excellent after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 15 5 0 5 5 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............48 49 53 61 66 70 73 75 76 76 76 74
RH..............35 34 33 29 24 21 18 17 17 16 16 16
20 FT wind dir..SW S S S S SW SW SW W W W W
20 FT wind spd..5 5 5 5 6 6 8 9 10 11 11 11
20 FT wind gust.7 7 7 7 8 10 13 14 16 17 17 17
Ridge wind dir..SW S S S S SW SW SW W W W W
Ridge wind spd..10 10 10 10 10 15 15 15 15 20 20 20
Mix hgt (kft)...0.5 0.5 0.5 1.5 5.0 7.5 10 11 11 12 11 11
Transp wind dir.S S S S W W W W W W W W
Transp wind spd.10 10 10 10 15 18 22 22 22 22 21 21
SDspl kt-ft/10005 5 5 14 65 122 193 201 210 218 202 197
.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly clear. Lows around 50. Highs in the mid 70s. Southwest
winds around 9 mph.
.FRIDAY...
Cooler. Partly cloudy. Slight chance of showers and
thunderstorms. Lows in the upper 40s. Highs in the mid 60s. West
winds around 11 mph.
.SATURDAY...
Mostly clear. Lows around 40. Highs in the upper 60s. West winds
around 8 mph.
$$
Forecaster...Hattings
Requested by...Cody Norton
Type of request...WILDFIRE
.TAG 2519241.0/RIW
.DELDT 08/05/25
.FormatterVersion 2.0.0
.EMAIL cody.norton@usda.gov