Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
114
FNUS75 KRIW 302125
FWSRIW
Spot Forecast for Willow Creek Fire...BLM
National Weather Service Riverton WY
325 PM MDT Sat Aug 30 2025
Forecast is based on forecast start time of 1600 MDT on August 30.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
A north/northwest wind around 10 mph will fade this evening
becoming light overnight. Skies will remain mostly clear overnight
into Sunday. Light west winds around 5 mph starts the day Sunday.
Winds shift to be from the north around 1100L. Wind increases
around 1200L, being around 8 mph, with occasional gusts up to 15
mph through the afternoon. No precipitation is expected, with a
mostly clear sky. Temperatures trend up a few degrees the next
couple days, with RH`s trending down a few percent. Smoke
dispersal will be fair to good. Sunday night, winds shift to be
from the east/southeast around 2400L.
...Thunderstorms imply strong gusty and erratic winds...
.TONIGHT...
Sky/weather.........Mostly clear (5-15 percent). Patchy smoke.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 48.
Max humidity........47-59 percent.
Wind (20 ft)........North winds 7 to 12 mph until 2400, then light.
Gusts up to 18 mph.
Ridgetop wind.......North 10 to 15 mph until 0100, then northeast.
Mixing height.......7000 ft AGL until 1900.
Transport winds.....North 10 to 16 mph until 0200, then northeast
9 to 10 mph.
Smoke dispersal.....Good until 1900. Poor after 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10 10 5 5 5 5 5 5 5 5 5 5
Weather cov..... PTY PTY PTY PTY PTY PTY
Weather type.... SMK SMK SMK SMK SMK SMK
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............66 63 58 55 54 53 52 51 50 50 50 49
RH..............26 31 37 39 43 46 48 49 50 50 51 51
20 FT wind dir..NW N NW N N NE NE NE NE NE NE NE
20 FT wind spd..10 8 9 8 8 7 6 6 6 6 6 6
20 FT wind gust.14 12 13 12 11 10 10 8 10 10 10 8
Ridge wind dir..NW N NW N N NE NE NE NE NE NE NE
Ridge wind spd..15 15 15 15 10 10 10 10 10 10 10 10
Mix hgt (kft)...7.0 2.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.N N N N N N N NE NE NE NE E
Transp wind spd.16 15 13 13 12 10 10 10 10 10 10 9
SDspl kt-ft/1000124 59 14 15 15 13 13 12 12 12 12 11
.SUNDAY...
Sky/weather.........Sunny (0-10 percent). Patchy smoke.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....68-74.
Min humidity........20-25 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Southeast around 10 mph until 1100, then
northwest.
Mixing height.......8000 ft AGL after 1500.
Transport winds.....East 5 to 10 mph until 1200, then northwest 8 to
13 mph.
Smoke dispersal.....Poor until 1000, then increasing to Good after
1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 10 10 0 5 5 5 10 10 10 10 10
Weather cov.....PTY PTY PTY PTY PTY PTY PTY PTY PTY
Weather type....SMK SMK SMK SMK SMK SMK SMK SMK SMK
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 48 51 55 60 64 67 69 70 70 70 70
RH..............52 52 50 44 38 32 28 26 24 23 23 23
20 FT wind dir..E E SE SE S NW NW NW NW N N NW
20 FT wind spd..5 5 5 4 4 4 6 6 6 6 6 6
20 FT wind gust.6 6 6 6 6 6 7 7 8 8 8 8
Ridge wind dir..E E SE SE S NW NW NW NW N N NW
Ridge wind spd..10 10 10 5 10 10 10 10 10 10 10 10
Mix hgt (kft)...0.1 0.1 0.1 0.1 2.0 4.0 6.0 7.0 7.5 8.0 7.5 7.0
Transp wind dir.E E E E E NE N NW NW NW NW NW
Transp wind spd.8 8 8 7 8 8 9 10 10 12 12 10
SDspl kt-ft/100011 12 12 12 25 48 71 85 84 95 95 92
.SUNDAY NIGHT...
Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 50.
Max humidity........41-49 percent.
Wind (20 ft)........Light winds until 0300, then east 5 to 10 mph.
Ridgetop wind.......Northeast around 10 mph until 2300, then east.
Mixing height.......6000 ft AGL until 1900.
Transport winds.....Northwest 6 to 11 mph until 0200, then Southeast
8 to 13 mph after 0200.
Smoke dispersal.....Good early in the evening decreasing to Poor after
2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........20 25 15 15 15 10 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............69 66 62 59 57 56 55 54 54 53 52 51
RH..............24 29 32 35 36 37 39 40 41 42 43 43
20 FT wind dir..N N NE NE NE E E E E E E E
20 FT wind spd..6 5 5 5 5 6 6 6 6 7 8 8
20 FT wind gust.11 8 8 8 8 8 10 10 10 10 10 10
Ridge wind dir..N N NE NE NE E E E E E E E
Ridge wind spd..10 10 10 10 10 10 10 10 10 10 10 10
Mix hgt (kft)...6.0 1.0 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
Transp wind dir.N N N NE NE E E E SE SE SE SE
Transp wind spd.10 9 9 9 9 10 10 10 12 13 13 12
SDspl kt-ft/100075 22 9 10 12 12 13 13 17 18 18 17
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Mostly clear. Lows in the lower 50s. Highs in the mid 70s. Light
winds.
.WEDNESDAY...
Mostly clear. Lows in the lower 50s. Highs in the mid 70s. Light
winds.
.THURSDAY...
Mostly clear. Lows around 50. Highs in the mid 70s. Light winds.
$$
Forecaster...Rowe
Requested by...Dionysius Nicolas - Plans Section
Type of request...WILDFIRE
.TAG 2520679.4/RIW
.DELDT 08/30/25
.FormatterVersion 2.0.0
.EMAIL dnicolas@blm.gov,dionysius-caesar_nicolas@firenet.gov