Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
876
FNUS75 KRIW 141005
FWSRIW
Spot Forecast for Telephone...USFS
National Weather Service Riverton WY
405 AM MDT Mon Sep 14 2026
Forecast is based on forecast start time of 0500 MDT on September 14.
If conditions become unrepresentative, contact the National Weather
Service
...HIGH WIND WARNING IN EFFECT UNTIL 1400...
A gusty wind persists through much of the day following a frontal
passage earlier this morning. Cooler and drier air moved in behind
the front. Humidity will remain rather low today, but recovery will
be much better tonight with humidity recovering to over 60 percent.
Dry conditions are expected today through Tuesday. Much less wind
will occur on Tuesday. Moisture then increases from the south with
increasing humidity and a chance of showers each day from Wednesday
through Friday and possibly into Saturday.
.DISCUSSION...
...Thunderstorms imply strong gusty and erratic winds...
.TODAY...
Sky/weather.........Becoming mostly sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 59.
Min humidity........23 percent.
Wind (20 ft)........West winds increasing to 17 to 24 mph. Gusts
up to 35 mph increasing to 39 mph late in the
morning.
Ridgetop wind.......West 15 to 20 mph until 0900, then 25 to 30
mph.
Mixing height.......1000 ft AGL until 0900, rising to 5000 ft AGL
after 1200.
Transport winds.....West 18 to 25 mph until 1100, then 25 to 31
mph.
Smoke dispersal.....Poor until 0900, becoming very good between 1100
and 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........15 10 5 5 5 5 5 10 5 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............38 36 34 40 48 51 53 56 57 57 58 59
RH..............64 61 59 45 36 32 29 27 26 24 23 24
20 FT wind dir..W W W W W W W W W W W W
20 FT wind spd..13 15 16 18 20 23 23 23 23 22 20 18
20 FT wind gust.20 21 24 27 30 34 37 34 34 33 30 27
Ridge wind dir..W W W W W W W W W W W W
Ridge wind spd..15 20 20 25 25 30 25 30 25 25 25 25
Mix hgt (kft)...0.5 0.5 1.0 2.5 3.5 4.0 4.5 4.5 5.0 5.0 5.0 5.0
Transp wind dir.W W W W W W W W W W W W
Transp wind spd.18 18 20 23 25 28 29 31 31 29 28 25
SDspl kt-ft/10009 9 16 54 73 93 108 128 132 129 125 115
.TONIGHT...
Sky/weather.........Mostly clear (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 28.
Max humidity........71 percent.
Wind (20 ft)........Northwest winds 7 to 13 mph with gusts to
around 24 mph until 2000, then becoming north
6 to 9 mph with gusts to 10 to 14 mph until
2300, then light.
Ridgetop wind.......Northwest 15 to 20 mph until 2100, then north
10 to 15 mph until 0200, then east.
Mixing height.......3500 ft AGL until 2000, then 500 ft AGL.
Transport winds.....Northwest 13 to 22 mph until 2200, then north 8
to 12 mph until 0200, then southeast 7 to 8
mph.
Smoke dispersal.....Good until 1900, becoming poor by 2100.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........15 15 10 10 10 10 10 10 5 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............57 55 51 44 41 39 37 35 34 33 31 31
RH..............25 26 32 39 46 52 58 63 67 67 68 70
20 FT wind dir..W W NW N N N N NE E E E E
20 FT wind spd..13 10 7 6 6 4 4 3 3 2 2 2
20 FT wind gust.24 19 16 13 11 8 7 6 6 6 5 4
Ridge wind dir..W W NW N N N N NE E E E E
Ridge wind spd..20 15 15 15 10 10 10 10 10 5 5 5
Mix hgt (kft)...5.0 3.5 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 NW N N N NE E E SE SE
Transp wind spd.22 17 14 13 12 9 9 8 8 8 7 8
SDspl kt-ft/100091 55 8 6 6 5 4 4 4 4 3 4
.TUESDAY...
Sky/weather.........Mostly sunny (20 to 30 percent), then becoming
partly sunny (45 to 55 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 66.
Min humidity........23 percent.
Wind (20 ft)........Light winds until 1300, then southwest 7 to 10
mph with gusts to around 19 mph.
Ridgetop wind.......Light winds until 1100, then southwest 10 to 15
mph.
Mixing height.......2000 ft AGL until 1100, rising to 7500 ft AGL
by 1400.
Transport winds.....East 7 to 8 mph until 0900, then southwest 7 to
14 mph until 1300, then 18 to 22 mph.
Smoke dispersal.....Poor until 1000, becoming very good by 1300.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........10 10 10 5 5 5 10 30 45 50 60 65
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............31 29 32 39 49 53 57 60 62 64 64 66
RH..............71 72 69 55 42 36 31 27 26 23 22 22
20 FT wind dir..E N NE S SW SW SW SW SW SW SW SW
20 FT wind spd..1 0 1 1 2 4 6 7 9 10 9 8
20 FT wind gust.4 2 4 4 6 10 12 14 18 19 18 18
Ridge wind dir..E N NE S SW SW SW SW SW SW SW SW
Ridge wind spd..5 5 5 5 5 10 10 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 1.0 1.5 2.0 3.0 3.5 6.0 7.5 7.0 8.0 6.5
Transp wind dir.SE E E SW SW SW SW SW SW SW SW SW
Transp wind spd.7 8 7 7 9 12 14 20 22 21 21 18
SDspl kt-ft/10003 4 6 9 16 29 44 101 138 126 148 107
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
Partly cloudy. Slight chance of showers and thunderstorms. Lows
in the mid 30s. Highs in the upper 60s. Light winds.
.THURSDAY...
Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the upper 60s.
Light winds.
.FRIDAY...
Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 30s. Highs in the mid 60s. Light
winds.
$$
Forecaster...Hattings
Requested by...Brandon Bones
Type of request...WILDFIRE
.TAG 2621796.0/RIW
.DELDT 09/14/26
.FormatterVersion 2.0.0
.EMAIL branbon.bonenberger@usda.gov