Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
959
FNUS75 KRIW 262111
FWSRIW
Spot Forecast for Cabin Spring...USFS SHF
National Weather Service Riverton WY
311 PM MDT Sat Sep 26 2026
Forecast is based on forecast start time of 0600 MDT on September 27.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Scattered clouds will be in place through the day. Winds will be
light (10 mph or less) through the morning, becoming southwest 10
to 15 mph after 1200. Skies will become overcast by 1800, with
rain showers becoming possible (30% chance) between between 1900
and 0100. Clouds will remain scattered through the rest of the
night and through the day Monday. Another chance for showers
(30%) will return Monday afternoon. Confidence for a wetting rain
remains little to none with either chance Sunday or Monday.
...Thunderstorms imply strong gusty and erratic winds...
.SUNDAY...
Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...2 percent.
Max temperature.....Around 71.
Min humidity........26 percent.
Wind (20 ft)........Light winds until 1500, then southwest around 7
mph with gusts to around 14 mph until 1600,
then light.
Ridgetop wind.......East around 10 mph until 1000, then southwest.
Mixing height.......1500 ft AGL until 1200. 5500 ft AGL after 1500.
Transport winds.....East 8 to 9 mph until 0900, then south 9 to 15
mph.
Smoke dispersal.....Poor until 1500, then good until 1700, then
fair.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........45 50 50 45 45 45 55 40 40 40 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............53 51 53 56 58 61 63 66 69 70 70 71
RH..............45 45 44 41 40 38 34 32 29 26 26 27
20 FT wind dir..E E E SE SW SW SW SW SW SW SW S
20 FT wind spd..4 3 3 4 4 5 6 6 6 7 6 6
20 FT wind gust.6 6 6 6 6 8 10 11 12 14 14 14
Ridge wind dir..E E E SE SW SW SW SW SW SW SW S
Ridge wind spd..10 10 10 10 10 10 10 15 15 15 15 15
Mix hgt (kft)...0.5 0.5 0.5 1.0 1.5 1.5 2.5 2.5 3.5 5.5 5.5 4.5
Transp wind dir.SE E SE S S S S S SW SW SW S
Transp wind spd.9 8 8 9 9 10 12 13 13 15 15 13
SDspl kt-ft/10003 3 3 8 11 16 23 27 38 70 72 49
.SUNDAY NIGHT...
Sky/weather.........Mostly cloudy (70-80 percent) then becoming
partly cloudy (35-45 percent). Chance of rain
showers and slight chance of thunderstorms in
the evening. Slight chance of rain showers
overnight.
CWR.................2 percent.
Chance of pcpn......40 percent.
Chance of thunder...11 percent.
Min temperature.....Around 53.
Max humidity........53 percent.
Wind (20 ft)........Light winds until 2000, then east around 7 mph
with gusts to around 14 mph until 2100, then
light. Gusty and erratic winds expected near
thunderstorms in the evening.
Ridgetop wind.......East 10 to 15 mph.
Mixing height.......1000 ft AGL until 2000, then 500 ft AGL.
Transport winds.....Southeast 8 to 14 mph until 0300, then east 8
to 9 mph.
Smoke dispersal.....Poor.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........85 80 75 65 70 65 80 85 65 40 35 40
Weather cov..... SCH CHC SCH SCH CHC SCH
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH SCH
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 20 30 20 20 40 20 0 0 0 0 10
Chc of thdr (%).0 10 10 10 10 10 0 0 0 0 0 0
Temp............69 67 65 62 60 59 58 57 57 56 55 54
RH..............30 33 36 39 42 44 47 48 49 50 51 53
20 FT wind dir..SE SE E E E E E E SE E E E
20 FT wind spd..6 6 7 6 5 4 5 3 4 4 3 3
20 FT wind gust.13 12 14 14 11 10 7 6 6 6 5 5
Ridge wind dir..SE SE E E E E E E SE E E E
Ridge wind spd..15 10 15 15 10 10 10 10 10 10 10 10
Mix hgt (kft)...2.5 1.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.S SE SE SE S SE SE SW S E E E
Transp wind spd.13 12 14 13 10 9 10 8 9 9 8 8
SDspl kt-ft/100026 11 8 6 5 4 4 4 4 4 3 3
.MONDAY...
Sky/weather.........Mostly sunny (45-55 percent). Chance of rain
showers in the afternoon. Slight chance of
thunderstorms late in the afternoon.
CWR.................6 percent.
Chance of pcpn......30 percent.
Chance of thunder...12 percent.
Max temperature.....Around 63.
Min humidity........40 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
near thunderstorms late in the afternoon.
Ridgetop wind.......East around 10 mph until 0800, then south until
0900, then west.
Mixing height.......2000 ft AGL until 1100. 5500 ft AGL after 1400.
Transport winds.....East around 8 mph until 0800. Southwest 8 to 12
mph after 0900.
Smoke dispersal.....Poor until 1000. Fair after 1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........50 30 50 65 60 60 55 60 60 65 65 65
Weather cov..... CHC CHC CHC CHC CHC CHC
Weather type.... RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH
CWR.............0 0 0 0 0 0 10 10 10 10 10 10
Chc of pcpn (%).10 10 10 10 10 10 30 30 30 30 30 30
Chc of thdr (%).0 0 0 10 10 10 10 10 10 10 10 10
Temp............54 53 54 55 57 59 60 62 62 63 62 61
RH..............53 55 54 51 49 48 46 43 41 40 41 44
20 FT wind dir..E E S SW SW SW SW W W W W W
20 FT wind spd..3 3 3 3 4 4 5 5 6 6 6 6
20 FT wind gust.5 5 5 6 6 7 8 10 10 10 11 11
Ridge wind dir..E E S SW SW SW SW W W W W W
Ridge wind spd..10 10 10 10 10 10 10 10 10 10 10 10
Mix hgt (kft)...0.5 0.5 1.0 1.0 2.0 2.5 3.0 4.0 4.5 5.5 5.0 4.0
Transp wind dir.E E SE SW SW SW SW SW W W W SW
Transp wind spd.8 8 8 8 9 9 10 10 12 12 12 12
SDspl kt-ft/10003 3 6 9 15 19 27 34 46 54 48 42
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Partly cloudy. Chance of showers and slight chance of
thunderstorms. Lows in the upper 40s. Highs in the mid 60s. West-
southwest winds 10-15 mph.
.WEDNESDAY...
Mostly clear. Lows in the upper 40s. Highs in the upper 60s.
West winds 10-15 mph.
.THURSDAY...
Mostly clear. Lows around 50. Highs in the upper 60s. South-
southwest winds 10-15 mph.
$$
Forecaster...LaVoie
Requested by...Jon Warder
Type of request...WILDFIRE
.TAG 2622426.7/RIW
.DELDT 09/26/26
.FormatterVersion 2.0.0
.EMAIL rochelle.plocek@usda.gov,jonathan.warder@usda.gov,wycdc@firenet.gov,2026.cabinsprings.plans@firenet.gov,matthew.brazier@usda.gov