Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
352
FNUS75 KRIW 272106
FWSRIW
Spot Forecast for Cabin Spring...USFS
National Weather Service Riverton WY
306 PM MDT Sun Sep 27 2026
Forecast is based on forecast start time of 0600 MDT on September 28.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Light rain showers will be in the vicinity, becoming likely
between 1000 and 1300. There is a little to no chance for a
wetting rain with these showers. Winds will remain light (10 mph
or less) through the day. Skies will remain mostly cloudy to
overcast Monday and Monday night, with clearing skies Tuesday
morning. Conditions will remain dry Tuesday with light winds.
...Thunderstorms imply strong gusty and erratic winds...
.MONDAY...
Sky/weather.........Partly cloudy (45-55 percent). Chance of rain
showers through the day. Slight chance of
thunderstorms in the afternoon.
CWR.................2 percent.
Chance of pcpn......40 percent.
Chance of thunder...11 percent.
Max temperature.....Around 67.
Min humidity........41 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
near thunderstorms late in the afternoon.
Ridgetop wind.......East around 10 mph until 0700, then light until
1300, then southwest around 10 mph.
Mixing height.......2000 ft AGL until 1100. 5000 ft AGL after 1400.
Transport winds.....East around 8 mph until 0700, then southwest
around 7 mph until 0800, then light until 1100,
then west 7 to 9 mph.
Smoke dispersal.....Poor until 1100 increasing to fair after 1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........65 60 50 45 45 45 50 45 40 35 45 60
Weather cov.....SCH SCH SCH CHC CHC CHC SCH SCH
Weather type....RW RW RW RW RW RW RW RW
Tstm cov........ SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).20 20 10 10 20 30 40 30 10 10 10 20
Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 10
Temp............56 56 57 57 58 60 61 62 63 64 64 64
RH..............54 54 54 54 55 56 57 55 52 49 47 46
20 FT wind dir..E NE N N N SW SW SW SW SW SW W
20 FT wind spd..3 2 1 0 0 1 2 3 4 4 4 3
20 FT wind gust.6 6 5 5 5 5 5 6 6 6 6 6
Ridge wind dir..E NE N NW W SW SW SW SW SW SW W
Ridge wind spd..10 5 5 5 5 5 5 10 10 10 10 10
Mix hgt (kft)...0.5 0.5 0.5 1.0 2.0 2.5 3.0 3.5 4.5 5.0 5.0 4.5
Transp wind dir.E SW E W W W W SW SW SW W W
Transp wind spd.8 7 6 5 6 7 7 8 9 9 9 8
SDspl kt-ft/10003 4 3 5 9 14 19 25 36 40 41 30
.MONDAY NIGHT...
Sky/weather.........Mostly cloudy (65-75 percent) then becoming
partly cloudy (35-45 percent). Slight chance of
rain showers early in the evening. Slight
chance of rain showers late in the evening.
CWR.................0 percent.
Chance of pcpn......20 percent.
Chance of thunder...8 percent.
Min temperature.....Around 49.
Max humidity........63 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......Light winds until 1900, then north around 10
mph until 2000, then east.
Mixing height.......2500 ft AGL until 1900, then 500 ft AGL.
Transport winds.....North around 8 mph until 1900, then east 8 to 9
mph.
Smoke dispersal.....Poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........70 85 65 60 80 55 60 25 45 50 35 40
Weather cov.....SCH SCH SCH
Weather type....RW RW RW
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).20 10 10 20 20 10 0 0 0 0 0 0
Chc of thdr (%).10 10 0 10 10 10 0 0 0 0 0 0
Temp............64 61 57 56 55 54 53 52 52 51 51 50
RH..............44 48 51 54 57 58 59 60 60 63 63 63
20 FT wind dir..W N SE E E E E E E E E NE
20 FT wind spd..1 3 4 4 3 3 3 3 3 3 3 4
20 FT wind gust.6 6 6 6 6 5 5 4 5 5 5 6
Ridge wind dir..W N SE E E E E E E E E NE
Ridge wind spd..5 10 10 10 10 10 10 10 10 10 10 10
Mix hgt (kft)...2.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.N NE E E E E E SE E E SE E
Transp wind spd.8 8 9 9 8 8 8 8 8 8 8 9
SDspl kt-ft/100019 5 4 4 3 3 4 4 3 3 3 3
.TUESDAY...
Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 66.
Min humidity........31 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......East around 10 mph until 0900, then south until
1200, then west.
Mixing height.......2000 ft AGL until 1100, then 4500 ft AGL.
Transport winds.....East 8 to 9 mph until 0900. West 9 to 13 mph
after 1100.
Smoke dispersal.....Poor until 1200, increasing to fair until 1600,
then poor.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........50 20 20 15 15 10 10 10 5 5 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............50 49 51 54 57 59 62 64 65 66 66 65
RH..............63 62 58 52 48 45 42 38 34 31 30 30
20 FT wind dir..E E SE S S SW W W W W W W
20 FT wind spd..4 3 3 3 3 4 5 6 6 6 6 4
20 FT wind gust.6 5 5 5 6 6 8 10 11 11 10 7
Ridge wind dir..E E SE S S SW W W W W W W
Ridge wind spd..10 10 10 10 10 10 10 10 15 15 10 10
Mix hgt (kft)...0.5 0.5 1.0 1.0 2.0 3.0 4.0 4.0 4.5 4.5 4.0 3.0
Transp wind dir.E E SE S S SW W W W W W W
Transp wind spd.9 8 8 8 8 9 10 12 13 13 12 9
SDspl kt-ft/10004 3 6 8 15 24 36 42 49 52 38 22
.FORECAST DAYS 3 THROUGH 5...
.WEDNESDAY...
Clear. Lows in the upper 40s. Highs in the upper 60s. West-
northwest winds 10-15 mph.
.THURSDAY...
Mostly clear. Lows in the mid 40s. Highs in the lower 60s.
Southwest winds 10-15 mph.
.FRIDAY...
Mostly clear. Lows in the upper 40s. Highs in the upper 60s.
Southwest winds 10-15 mph.
$$
Forecaster...LaVoie
Requested by...Jon Warder
Type of request...WILDFIRE
.TAG 2622426.9/RIW
.DELDT 09/27/26
.FormatterVersion 2.0.0
.EMAIL jonathan.warder@usda.gov,rochelle.plocek@usda.gov,matthew.brazier@usda.gov,2026.cabinsprings.plans@firenet.gov,wycdc@firenet.gov