Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
946
FNUS75 KRIW 111116
FWSRIW
Spot Forecast for WEISER KNOLL...US Wildland Fire Service
National Weather Service Riverton WY
516 AM MDT Tue Aug 11 2026
Forecast is based on forecast start time of 0600 MDT on August 11.
If conditions become unrepresentative, contact the National Weather
Service
...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS
EVENING...
.DISCUSSION...
Red Flag conditions in place today, with temperatures around 90
degrees and RH values as low as 11 percent. Winds will not be as
strong today compared to Monday, with gusts around 15 to 20 mph.
Conditions will remain dry, with hazy/smoky skies. RH recovery
will be fair to poor tonight, even as clouds increase and remain
mostly cloudy through much of the night.
Skies will remain mostly cloudy to overcast through the day
Wednesday, resulting in cooler temperatures. Currently there is a
10 to 20% chance for a shower or afternoon thunderstorm.
Conditions will be more moist and cooler from Wednesday onward
through the rest of the week.
...Thunderstorms imply strong gusty and erratic winds...
.TODAY...
Sky/weather.........Mostly sunny (35-45 percent). Smoke.
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...5 percent.
Max temperature.....86-92.
Min humidity........11 percent.
Wind (20 ft)........Light winds until 1200, then north 7 to 8 mph
with gusts to around 13 mph until 1500, then
light.
Ridgetop wind.......Southwest around 10 mph until 0800, then light
until 1000, then north 10 to 15 mph.
Mixing height.......2000 ft AGL until 1000. 14000 ft AGL after
1300.
Transport winds.....West 8 to 15 mph.
Smoke dispersal.....Poor until 0900. Very good increasing to
excellent in the afternoon after 1400.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........45 45 35 25 25 30 35 35 40 35 40 55
Weather cov.....ARS DEF DEF DEF ARS ARS ARS DEF DEF DEF DEF DEF
Weather type....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
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 10 10 0 10
Chc of thdr (%).0 0 0 0 0 0 0 0 10 10 0 10
Temp............69 69 72 76 79 82 84 86 87 89 88 88
RH..............32 31 27 24 20 18 16 14 12 11 11 11
20 FT wind dir..SW W W NW NW N N N N N NW W
20 FT wind spd..5 3 3 3 5 6 8 8 7 6 6 6
20 FT wind gust.6 6 6 7 8 10 12 12 13 13 12 12
Ridge wind dir..SW W W NW NW N N N N N NW W
Ridge wind spd..10 10 5 5 10 10 15 15 15 10 10 10
Mix hgt (kft)...0.5 0.5 0.5 2.0 4.0 7.0 11 13 14 14 14 13
Transp wind dir.SW W W W NW NW W W W W W W
Transp wind spd.13 10 8 9 10 12 14 15 15 15 15 13
SDspl kt-ft/10007 6 5 21 53 91 147 171 182 186 182 145
.TONIGHT...
Sky/weather.........Mostly cloudy (60-70 percent) then becoming
partly cloudy (45-55 percent). Smoke early in
the evening. Areas of smoke early in the
evening. Slight chance of showers overnight.
CWR.................0 percent.
Chance of pcpn......20 percent.
Chance of thunder...2 percent.
Min temperature.....Around 66.
Max humidity........34 percent.
Wind (20 ft)........Light winds until 1900, then southwest 7 to 13
mph with gusts to around 18 mph until 0100,
then light.
Ridgetop wind.......West 10 to 15 mph until 2100, then southwest 15
to 20 mph until 0100, then west around 10 mph
until 0300, then light until 0500, then
southwest around 10 mph.
Mixing height.......11500 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....West 13 to 20 mph until 0100, then 7 to 10 mph.
Smoke dispersal.....Very good until 1900. Poor after 2000.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........55 60 65 70 65 60 55 55 50 50 50 50
Weather cov.....DEF DEF ARS ARS ARS ARS ARS ARS ARS ARS ARS ARS
Weather type....SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK SMK
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 10 10 10 10 10 10 10 20 10 10 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............88 85 82 79 78 76 75 74 72 71 71 70
RH..............12 14 17 19 21 24 25 26 26 27 28 30
20 FT wind dir..W W SW SW SW SW W W W W W SW
20 FT wind spd..6 8 11 13 12 10 7 6 4 3 3 4
20 FT wind gust.13 14 17 18 16 12 10 7 6 6 6 6
Ridge wind dir..W W SW SW SW SW W W W W W SW
Ridge wind spd..10 15 15 20 20 15 15 10 10 5 5 10
Mix hgt (kft)...12 6.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.NW W W W W W W W W W W W
Transp wind spd.13 14 17 20 20 16 13 10 9 7 7 8
SDspl kt-ft/1000131 96 12 11 11 9 7 5 4 4 4 4
.WEDNESDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Slight chance of
showers and thunderstorms in the afternoon.
CWR.................0 percent.
Chance of pcpn......20 percent.
Chance of thunder...13 percent.
Max temperature.....79-85.
Min humidity........22 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
near thunderstorms in the afternoon.
Ridgetop wind.......West around 10 mph until 0900, then northwest
until 1300, then east until 1700, then
northwest.
Mixing height.......1500 ft AGL until 1000, then 3000 ft AGL until
1100, then 5500 ft AGL until 1200, then 8500 ft
AGL until 1600, then 7500 ft AGL.
Transport winds.....West 8 to 9 mph until 0900, then 8 to 16 mph.
Smoke dispersal.....Poor until 1000. Good increasing to very good
in the afternoon after 1300.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........55 85 80 90 95 95 80 85 70 75 60 60
Weather cov..... SCH SCH SCH SCH SCH
Weather type.... 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 0 0 0 0 10 20 20 20 10 10 0
Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 0
Temp............69 67 68 70 74 76 77 78 79 80 81 81
RH..............31 32 32 31 28 26 25 23 22 21 21 21
20 FT wind dir..SW SW W NW NW NW NW E SE E NE NW
20 FT wind spd..6 3 3 4 4 5 6 6 6 6 6 6
20 FT wind gust.7 6 6 6 7 10 11 12 14 14 13 12
Ridge wind dir..SW SW W NW NW NW NW E SE E NE NW
Ridge wind spd..10 10 10 10 10 10 10 10 15 15 15 10
Mix hgt (kft)...0.5 0.5 0.5 1.5 3.0 5.5 7.5 8.5 8.0 7.0 6.5 7.5
Transp wind dir.SW W W NW NW NW NW SW W W NW NW
Transp wind spd.9 8 8 8 9 10 12 15 16 13 14 13
SDspl kt-ft/10005 3 5 12 28 58 74 116 111 80 80 83
.FORECAST DAYS 3 THROUGH 5...
.THURSDAY...
Mostly cloudy. Showers likely and chance of thunderstorms. Lows
around 60. Highs in the mid 70s. West-northwest winds 10-15 mph.
.FRIDAY...
Mostly cloudy. Showers likely and slight chance of thunderstorms.
Lows in the mid 50s. Highs in the mid 70s. West-southwest winds
15-25 mph.
.SATURDAY...
Mostly cloudy. Slight chance of showers and thunderstorms. Lows
in the mid 50s. Highs in the upper 70s. West winds 10-15 mph.
$$
Forecaster...LaVoie
Requested by...Shelby Bell
Type of request...WILDFIRE
.TAG 2619324.2/RIW
.DELDT 08/11/26
.FormatterVersion 2.0.0
.EMAIL jellington@blm.gov,wycdc@firenet.gov,choffman@blm.gov