Suppression Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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FNUS75 KRIW 072038
FWSRIW
Spot Forecast for SVF-2A_2B...USFS
National Weather Service Riverton WY
238 PM MDT Mon Apr 7 2025
Forecast is based on ignition time of 0800 MDT on April 09.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Wednesday will be the windiest day of the week with frequent
westerly gusts between 20-25 mph beginning mid-morning.
The strongest winds are forecast Wednesday afternoon and should
quickly diminish after sunset. Smoke dispersal should be good with
peak afternoon mixing heights forecast around 7500 feet. Minimum
relative humidity values are forecast in the 40s percent range.
Precipitation chances should remain well north of the area.
Weaker south to southwest winds are forecast Thursday and Friday
with minimum relative humidity values in the 30s percent range.
Thursday`s smoke dispersal will be fair with peak mixing heights
forecast around 5500 feet. Friday`s smoke dispersal will be better
with peak mixing heights above 8000 feet. There are no precipitation
chances Thursday and Friday.
...Thunderstorms imply strong gusty and erratic winds...
.WEDNESDAY...
Sky/weather.........Mostly sunny (35-45 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...2 percent.
Max temperature.....Around 49.
Min humidity........45 percent.
Wind (20 ft)........Light winds until 1000, then west 7 to 12 mph
with gusts to around 19 mph.
Ridgetop wind.......West 10 to 15 mph until 1300, then around 20
mph.
Mixing height.......4000 ft AGL until 1100, then between 6500 ft
to 7500 ft AGL until 1700, then gradually
lowering to 5500 ft AGL.
Transport winds.....West 12 to 20 mph until 1200, then increasing
to 22 to 28 mph.
Smoke dispersal.....Poor until 1000 then gradually improving to
excellent in the afternoon, then becoming
very good after 1700.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........45 40 35 30 30 30 30 30 30 30
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0
Temp............32 34 37 40 42 44 45 46 47 47
RH..............73 69 61 56 51 48 46 45 44 44
20 FT wind dir..W W W W W W W W W W
20 FT wind spd..5 6 7 8 10 11 12 12 12 12
20 FT wind gust.10 12 14 14 17 18 19 19 19 18
Ridge wind dir..W W W W W W W W W W
Ridge wind spd..10 10 15 15 15 20 20 20 20 20
Mix hgt (kft)...2.5 3.0 4.0 5.0 6.0 6.5 7.0 7.5 6.5 5.5
Transp wind dir.W W W W W W W W W W
Transp wind spd.12 14 17 20 23 24 26 28 25 22
SDspl kt-ft/100024 37 61 87 122 137 160 177 142 105
.WEDNESDAY NIGHT...
Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 29.
Max humidity........62 percent.
Wind (20 ft)........West winds 9 to 11 mph with gusts around 18
mph through 2000, then light.
Ridgetop wind.......West 15 to 20 mph until 2100, then southwest
around 10 mph through 2400, then light.
Mixing height.......3500 ft AGL, then lowering to 1000 ft AGL
after 2000.
Transport winds.....West 13 to 20 mph through 2100, then decreasing
7 to 10 mph from the west, then decreasing to
7 mph from the south after 0200.
Smoke dispersal.....Good until 1900. Poor after 2100.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........30 25 20 15 10 10 10 10 10 10 10 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............46 44 41 38 36 35 34 33 32 31 30 30
RH..............45 48 51 54 56 58 59 59 59 59 60 61
20 FT wind dir..W W W W W SW S S S S S SE
20 FT wind spd..11 9 6 5 4 3 2 2 2 2 2 2
20 FT wind gust.18 14 12 10 7 6 6 5 5 5 5 5
Ridge wind dir..W W W W W SW S S S S S SE
Ridge wind spd..20 15 15 10 10 10 5 5 5 5 5 5
Mix hgt (kft)...4.5 3.5 2.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0
Transp wind dir.W W W W W W W SW SW S S S
Transp wind spd.20 16 13 10 9 8 7 7 7 7 7 7
SDspl kt-ft/100079 49 26 11 10 8 7 7 7 7 7 7
.THURSDAY...
Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 59.
Min humidity........31 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Light winds until 1300. Southwest around 10 mph
after 1400.
Mixing height.......2500 ft AGL until 1100. 5500 ft AGL after 1400.
Transport winds.....South 7 to 8 mph until 1200, then southwest 9
to 13 mph.
Smoke dispersal.....Poor until 1100. Fair early in the morning
increasing to good in the afternoon after 1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5 5 5 5 10 10 15 15 15 20 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............30 32 34 38 42 47 51 54 56 57 58 58
RH..............60 57 52 47 43 38 35 32 31 30 30 31
20 FT wind dir..SE SE S S S S SW SW SW SW SW SW
20 FT wind spd..2 2 2 2 2 2 2 2 3 3 3 3
20 FT wind gust.5 5 5 5 6 6 7 8 8 8 8 8
Ridge wind dir..SE SE S S S S SW SW SW SW SW SW
Ridge wind spd..5 5 5 5 5 5 5 5 10 10 10 10
Mix hgt (kft)...1.0 1.5 1.5 1.5 2.5 3.5 4.5 5.0 5.5 5.5 5.0 4.5
Transp wind dir.S S S S S SW SW SW SW SW SW SW
Transp wind spd.7 7 7 7 7 8 9 10 12 13 12 12
SDspl kt-ft/10007 8 9 10 16 25 35 44 53 63 52 47
.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Partly cloudy. Lows in the mid 30s. Highs in the mid 60s. Light
winds.
.SATURDAY...
Mostly cloudy. Slight chance of showers. Lows around 40. Highs in
the lower 60s. Light winds.
.SUNDAY...
Cooler. Partly cloudy. Chance of showers and snow showers. Lows
in the lower 30s. Highs in the upper 40s. West winds around
9 mph.
$$
Forecaster...Gerhardt
Requested by...WILL HALL
Type of request...PRESCRIBED
.TAG 2509083.0/RIW
.DELDT 04/07/25
.FormatterVersion 2.0.0
.EMAIL william.hall@usda.gov