Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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FNUS75 KRIW 041241
FWSRIW
Spot Forecast for Horse Fire...USFS
National Weather Service Riverton WY
641 AM MDT Mon Aug 4 2025
Forecast is based on forecast start time of 0700 MDT on August 04.
If conditions become unrepresentative, contact the National Weather
Service
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS
EVENING...
.DISCUSSION...
Critical fire weather conditions expected today with humidity
levels down to around 15 percent. Winds will be from the south and
southwest through the day, gusting 20 to 30 mph after 1300. There
will be some increasing clouds after 1500, but no precipitation is
expected today.
Humidity recovery overnight will be fair, likely not reaching 50
percent before sunrise. Winds will remain from the west through
the night 5 to 10 mph.
Gusty west winds return early Tuesday morning, with frequent gusts
above 20 mph expected through the day. Humidity levels will be
slightly higher around 20 percent in the afternoon. No
precipitation expected.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TODAY...
Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...3 percent.
Max temperature.....Around 73.
Min humidity........17 percent.
Wind (20 ft)........Light winds until 1100, then south 8 to 9 mph
with gusts to around 18 mph until 1400, then
southwest 9 to 11 mph with gusts to around 20
mph.
Ridgetop wind.......South 10 to 15 mph until 1600, then southwest
around 20 mph.
Mixing height.......2000 ft AGL until 1000. 14500 ft AGL after
1400.
Transport winds.....South 10 to 17 mph until 1200, then southwest
21 to 25 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1400.
TIME (MDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........30 5 5 5 0 5 20 20 20 25 35
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0
Temp............46 51 58 63 66 69 72 72 72 71 70
RH..............47 44 36 30 26 21 19 18 17 17 17
20 FT wind dir..S S SE SE SE S SW SW SW SW SW
20 FT wind spd..5 5 6 6 8 8 9 10 12 11 11
20 FT wind gust.10 10 11 13 14 17 19 18 19 21 20
Ridge wind dir..S S SE SE SE S SW SW SW SW SW
Ridge wind spd..10 10 10 15 15 15 15 15 15 20 20
Mix hgt (kft)...0.5 0.5 2.0 3.5 6.5 12 14 14 15 14 14
Transp wind dir.S SE S S S S SW SW SW SW SW
Transp wind spd.10 10 14 15 17 21 22 22 24 24 25
SDspl kt-ft/10005 5 23 45 96 213 254 269 302 299 294
.TONIGHT...
Sky/weather.........Partly cloudy (30-40 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...5 percent.
Min temperature.....Around 45.
Max humidity........55 percent.
Wind (20 ft)........West winds 7 to 11 mph. Gusts up to 24 mph.
Ridgetop wind.......West 15 to 20 mph.
Mixing height.......12000 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....Southwest 17 to 25 mph until 2100, then west 14
to 15 mph.
Smoke dispersal.....Excellent until 1900. Poor after 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........30 40 55 45 20 10 10 15 10 15 20 15
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 10 0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 10 0 0 0 0 0 0 0 0 0 0
Temp............69 67 64 63 57 53 50 49 49 48 47 46
RH..............19 20 24 25 33 41 48 50 50 54 53 55
20 FT wind dir..W W W W W NW NW NW NW W W W
20 FT wind spd..11 11 10 8 8 8 7 7 7 7 7 7
20 FT wind gust.19 18 17 16 14 13 13 12 12 12 12 11
Ridge wind dir..W W W W W NW NW NW NW W W W
Ridge wind spd..20 20 15 15 15 15 15 15 15 15 15 15
Mix hgt (kft)...12 7.5 1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.SW SW W W W W NW NW W W W W
Transp wind spd.25 23 17 15 15 15 14 14 14 14 14 14
SDspl kt-ft/1000259 149 12 8 7 7 7 7 7 7 7 7
.TUESDAY...
Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...1 percent.
Max temperature.....Around 70.
Min humidity........22 percent.
Wind (20 ft)........Light winds until 0700, then west 7 to 12 mph
with gusts to around 21 mph.
Ridgetop wind.......West 15 to 20 mph.
Mixing height.......1500 ft AGL until 0900. 8500 ft AGL after 1300.
Transport winds.....West 13 to 20 mph until 1100, then 23 to 26
mph.
Smoke dispersal.....Poor until 0800. Excellent after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........20 25 10 5 0 0 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 47 52 57 60 62 65 67 69 69 69 67
RH..............53 51 44 40 35 31 28 25 23 22 22 24
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..6 7 7 7 8 9 11 12 12 12 12 12
20 FT wind gust.11 12 13 14 16 18 20 21 21 21 21 20
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 1.5 3.5 4.5 5.5 7.0 7.5 8.0 8.5 8.5 8.5
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.13 14 14 17 20 23 25 25 26 26 25 24
SDspl kt-ft/10006 7 17 50 76 113 150 162 181 194 184 174
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 70s. Light
winds.
.THURSDAY...
Mostly clear. Lows around 50. Highs in the lower 70s. Southwest
winds around 9 mph.
.FRIDAY...
Partly cloudy. Lows in the upper 40s. Highs in the mid 60s. West
winds around 11 mph.
$$
Forecaster...Straub
Requested by...Aaron Baechle
Type of request...WILDFIRE
.TAG 2518772.5/RIW
.DELDT 08/04/25
.FormatterVersion 2.0.0
.EMAIL aaronbaechle@gmail.com