Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
526
FNUS75 KRIW 051135
FWSRIW
Spot Forecast for Hams Fork Rx Unit 6/8...USFS
National Weather Service Riverton WY
535 AM MDT Fri Jun 5 2026
Forecast is based on ignition time of 0800 MDT on June 05.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Skies remain clear today, with no rain expected. Humidity
recovered to 55% overnight, but is already falling and will reach
around 25% this afternoon. Southwest winds increase around 1100,
with some gust around 20 mph through the afternoon.
Saturday will be a near-critical fire weather day, with humidity
levels falling to 15 to 20% and southwest winds gusting 30 to 40
mph.
.REST OF TODAY...
Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 69.
Min humidity........24 percent.
Wind (20 ft)........Light winds until 1100, then west 8 to 9 mph
with gusts to around 18 mph.
Ridgetop wind.......West 10 to 15 mph.
Mixing height.......2000 ft AGL until 1000. 7000 ft AGL after 1200.
Transport winds.....West 8 to 17 mph until 1200, then 18 to 20 mph.
Smoke dispersal.....Poor until 0900. Very good after 1400.
TIME (MDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5 0 0 0 0 0 0 0 5 5
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............49 52 57 61 63 65 66 66 66 68
RH..............34 31 29 26 25 26 25 26 26 24
20 FT wind dir..SW W W W W W W W W W
20 FT wind spd..3 6 6 8 8 9 8 8 8 8
20 FT wind gust.7 13 14 17 18 18 18 18 18 18
Ridge wind dir..SW W W W W W W W W W
Ridge wind spd..10 10 15 15 15 15 15 15 15 15
Mix hgt (kft)...0.5 2.0 3.5 4.5 5.5 6.0 6.5 7.0 6.5 6.5
Transp wind dir.W W W W W W W W W W
Transp wind spd.8 12 15 17 18 18 18 20 18 18
SDspl kt-ft/10005 22 47 67 86 99 108 116 106 103
.TONIGHT...
Sky/weather.........Partly cloudy (25-35 percent) then becoming
mostly cloudy (50-60 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 52.
Max humidity........36 percent.
Wind (20 ft)........West winds around 7 mph with gusts to around 18
mph until 1900, then light.
Ridgetop wind.......West 10 to 15 mph until 2100, then light until
2300, then southeast around 10 mph.
Mixing height.......4500 ft AGL until 2000, then 500 ft AGL.
Transport winds.....West 8 to 17 mph until 2100, then southwest
around 7 mph until 2300, then south 8 to 13
mph.
Smoke dispersal.....Good until 1900. Poor after 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........5 5 15 25 20 25 35 30 35 45 50 55
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............66 64 62 56 54 53 53 53 54 54 53 54
RH..............26 28 33 35 36 36 33 32 31 31 32 30
20 FT wind dir..W W W SW S SE SE SE SE SE SE SE
20 FT wind spd..7 6 3 2 2 3 4 4 4 4 5 5
20 FT wind gust.18 14 10 6 7 8 10 10 10 10 10 11
Ridge wind dir..W W W SW S SE SE SE SE SE SE SE
Ridge wind spd..15 10 10 5 5 10 10 10 10 10 10 10
Mix hgt (kft)...5.5 4.5 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 SW S S S S SE S S
Transp wind spd.17 13 8 7 7 8 9 9 9 9 12 13
SDspl kt-ft/100085 50 5 3 3 4 5 4 4 4 6 6
.SATURDAY...
Sky/weather.........Mostly sunny (30-40 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 73.
Min humidity........20 percent.
Wind (20 ft)........Light winds until 0700, then south 7 to 13 mph
with gusts to around 26 mph until 1300, then
southwest 12 to 14 mph with gusts to around 29
mph.
Ridgetop wind.......South 10 to 15 mph until 1000, then southwest
around 20 mph.
Mixing height.......1000 ft AGL until 0900. 12000 ft AGL after
1200.
Transport winds.....South 13 to 20 mph until 1100, then southwest
25 to 30 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........55 50 45 25 20 25 15 15 20 30 20 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............53 54 55 58 64 69 71 72 72 71 69 70
RH..............33 35 34 34 28 22 22 21 20 21 22 21
20 FT wind dir..SE S S S S SW SW SW SW SW SW SW
20 FT wind spd..6 7 8 10 11 12 13 14 14 14 13 12
20 FT wind gust.13 16 18 20 22 24 26 28 29 29 29 26
Ridge wind dir..SE S S S S SW SW SW SW SW SW SW
Ridge wind spd..10 15 15 15 20 20 20 20 20 20 20 20
Mix hgt (kft)...0.5 0.5 1.0 2.5 4.5 7.5 11 12 12 11 12 11
Transp wind dir.S S S S SW SW SW SW SW SW SW SW
Transp wind spd.13 14 15 17 20 25 30 28 28 30 29 28
SDspl kt-ft/10006 7 14 35 75 167 276 283 281 276 293 265
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...
Cooler. Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the mid 40s. Highs around 60. Northwest
winds around 8 mph.
.MONDAY...
Partly cloudy. Lows in the mid 30s. Highs in the mid 60s. West
winds around 8 mph.
.TUESDAY...
Mostly cloudy. Lows in the mid 40s. Highs in the lower 60s.
Southwest winds around 9 mph.
$$
Forecaster...Straub
Requested by...Michael McEwen
Type of request...PRESCRIBED
.TAG 2614723.4/RIW
.DELDT 06/05/26
.FormatterVersion 2.0.0
.EMAIL michael.mcewen@usda.gov