Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
533
FNUS75 KRIW 261615
FWSRIW
Spot Forecast for Rand Creek...USFS
National Weather Service Riverton WY
1015 AM MDT Sat Sep 26 2026
Forecast is based on forecast start time of 1000 MDT on September 26.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Light westerly winds are expected until 1100L. Between 1100OL and
1200L, west to northwest winds will increase to a sustained 20 to
25 mph wind with gusts up to 35 mph. These winds are expected
through 2000L before gradually weakening to be light by 2200L tonight.
Expect light easterly winds from 2200L through at least 0900L Sunday
morning. There is fairly high confidence in dry weather through
sunrise Sunday, however there is a 10 percent chance of a stray
virga shower this afternoon. Minimum relative humidity values bottom
out in the mid 20s before increasing after 1800L to fair humidity
recovery overnight. High temperatures today will be in the upper 50s
to low 70s, with the higher elevations having the cooler
temperatures.
Rain shower potential increases on Sunday with cooler temperatures
and higher relative humidity.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TODAY...
Sky/weather.........Sunny (20-30 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 58.
Min humidity........27 percent.
Wind (20 ft)........West winds 16 to 25 mph with gusts to around 30
to 35 mph until 1400, then around 17 mph with
gusts to around 35 mph.
Ridgetop wind.......West 15 to 20 mph until 1300, then around 25
mph.
Mixing height.......5500 ft AGL until 1200, then 7500 ft AGL.
Transport winds.....Southwest 21 to 30 mph until 1300, then west 33
to 38 mph.
Smoke dispersal.....Good until 1100. Excellent after 1300.
TIME (MDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5 5 15 15 20 30 40 45
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0
Temp............53 55 56 56 56 56 55 57
RH..............35 34 30 30 29 27 29 29
20 FT wind dir..W W W W W W W W
20 FT wind spd..7 12 14 16 17 17 17 17
20 FT wind gust.11 23 26 29 30 29 30 29
Ridge wind dir..W W W W W W W W
Ridge wind spd..15 20 20 25 25 25 25 25
Mix hgt (kft)...4.0 5.5 6.5 7.0 7.5 7.5 7.0 6.5
Transp wind dir.W W SW W W W W W
Transp wind spd.21 25 30 33 37 38 36 35
SDspl kt-ft/100074 123 167 204 233 243 221 202
.TONIGHT...
Sky/weather.........Mostly cloudy (40-70 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...1 percent.
Min temperature.....Around 42.
Max humidity........53 percent.
Wind (20 ft)........West winds 8 to 14 mph with gusts to around 24
mph until 2200, then light.
Ridgetop wind.......West 15 to 20 mph until 2400, then around 10
mph.
Mixing height.......5500 ft AGL until 1900. 500 ft AGL after 2100.
Transport winds.....West around 30 mph until 1900. Southwest around
8 mph after 0500.
Smoke dispersal.....Very good until 1900. Poor after 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........40 55 65 60 60 70 70 70 75 75 85 70
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 10
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............56 53 50 48 47 46 45 45 45 43 43 43
RH..............33 38 40 42 44 45 47 47 48 50 51 52
20 FT wind dir..W W W W W W W W W W SW SW
20 FT wind spd..14 11 10 9 8 6 6 5 4 4 4 3
20 FT wind gust.24 23 21 14 13 10 8 6 6 6 5 4
Ridge wind dir..W W W W W W W W W W SW SW
Ridge wind spd..20 20 15 15 15 15 10 10 10 10 10 10
Mix hgt (kft)...5.5 2.5 1.0 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 SW SW SW SW
Transp wind spd.30 18 17 16 15 13 12 10 9 9 9 8
SDspl kt-ft/1000138 44 12 8 7 6 5 5 4 4 4 4
.SUNDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Slight chance of
rain showers throughout the day and a low
chance of thunderstorms in the afternoon.
CWR.................1 percent.
Chance of pcpn......30 percent.
Chance of thunder...13 percent.
Max temperature.....Around 54.
Min humidity........42 percent.
Wind (20 ft)........Light winds until 1300, then east 7 to 8 mph
with gusts to around 16 mph until 1700, then
light. Gusty and erratic winds expected near
thunderstorms in the afternoon.
Ridgetop wind.......West around 10 mph until 0700, then light until
0900, then southeast around 10 mph until 1000,
then east.
Mixing height.......2000 ft AGL until 1200, then 4500 ft AGL until
1700, then 2500 ft AGL.
Transport winds.....West around 8 mph until 1000, then south 9 to
16 mph.
Smoke dispersal.....Poor until 1300, then fair early in the morning
increasing to good in the afternoon until 1700,
then poor.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........80 85 65 50 40 55 65 55 45 55 70 75
Weather cov..... SCH SCH SCH SCH SCH CHC SCH
Weather type.... RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 20 10 0 0 0 10 10 10 20 30 20
Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 10
Temp............43 43 42 44 47 50 52 53 54 54 53 52
RH..............53 52 55 53 49 46 43 44 43 42 42 44
20 FT wind dir..W W W SE NE NE E E E E E E
20 FT wind spd..3 2 2 3 3 5 6 8 8 8 7 6
20 FT wind gust.4 4 4 6 7 11 14 16 16 16 14 13
Ridge wind dir..W W W SE NE NE E E E E E E
Ridge wind spd..10 5 5 10 10 10 15 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 0.5 0.5 1.5 2.0 3.0 4.0 4.0 4.5 4.0 2.5
Transp wind dir.W W W SW S S S SW SW S SE SE
Transp wind spd.8 8 8 8 9 10 13 15 15 16 15 13
SDspl kt-ft/10004 4 3 5 11 18 35 52 55 63 53 28
.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Mostly cloudy with showers and slight chance of thunderstorms.
Lows in the lower 40s and highs in the lower 50s. Light winds.
.TUESDAY...
Mostly clear. Low chance of showers in the morning. Lows in
the upper 30s and highs in the mid 50s. West winds around 7 mph.
.WEDNESDAY...
Mostly clear. Lows around 40 and highs in the upper 50s. West winds
around 10 mph with gusts up to 20 mph.
$$
Forecaster...Gerhardt
Requested by...Peter Freire
Type of request...WILDFIRE
.TAG 2622568.0/RIW
.DELDT 09/26/26
.FormatterVersion 2.0.0
.EMAIL travis.l.clark@usda.gov,peter.freire@usda.gov