Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
049
FNUS75 KRIW 092240
FWSRIW
Spot Forecast for WEISER KNOLL...US Wildland Fire Service
National Weather Service Riverton WY
440 PM MDT Sun Aug 9 2026
Forecast is based on forecast start time of 1700 MDT on August 09.
If conditions become unrepresentative, contact the National Weather
Service
...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING...
.DISCUSSION...
Gusty west winds up to 25 to 30 mph expected through 2300 before
diminishing there after through the morning hours Tuesday. Winds
then pick up once again after 1100 into the afternoon and evening
hours with similar speeds expected. Isolated showers possible
through sunset this evening (10-15%) but much of the activity will
remain south and east of the area. Poor RH recovery overnight
into the 30 to 35 percent range with similar dry and hot
conditions Tuesday as well. Mixing and smoke dispersal will remain
excellent through 2300 with the stronger winds, but become poor
there after into the morning hours Tuesday before winds increase
once again.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TODAY...
Sky/weather.........Partly sunny (60-70 percent). Areas of smoke.
Isolated showers.
CWR.................0 percent.
Chance of pcpn......15 percent.
Chance of thunder...10 percent.
Max temperature.....Around 91.
Min humidity........10 percent.
Wind (20 ft)........West winds around 15 to 20 mph with gusts to around
25 to 30 mph.
Ridgetop wind.......West around 35 mph.
Mixing height.......12000 ft AGL.
Transport winds.....West around 30 mph.
Smoke dispersal.....Excellent.
TIME (MDT) 5PM
Sky (%).........65
Weather cov.....ARS
Weather type....SMK
Tstm cov........
CWR.............0
Chc of pcpn (%).20
Chc of thdr (%).10
Temp............88
RH..............13
20 FT wind dir..W
20 FT wind spd..10
20 FT wind gust.18
Ridge wind dir..W
Ridge wind spd..25
Mix hgt (kft)...12
Transp wind dir.W
Transp wind spd.23
SDspl kt-ft/1000244
.TONIGHT...
Sky/weather.........Mostly cloudy (60-70 percent) then becoming
partly cloudy (25-35 percent). Areas of smoke
in the evening, then smoke overnight.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 63.
Max humidity........33 percent.
Wind (20 ft)........Southwest winds 10 to 15 mph with gusts to
until 2300, then light.
Ridgetop wind.......Southwest 15 to 20 mph until 2300, then around
10 mph.
Mixing height.......9000 ft AGL until 2300. 500 ft AGL after 2200.
Transport winds.....West 15 to 20 mph.
Smoke dispersal.....Excellent until 2300. Poor after 2300.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........60 65 70 65 70 40 25 20 15 15 25 15
Weather cov.....PTY ARS PTY ARS ARS ARS ARS PTY PTY ARS ARS 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 (%).10 10 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............86 84 80 77 74 74 73 71 70 67 65 65
RH..............13 14 18 21 22 23 23 24 27 28 30 32
20 FT wind dir..SW SW SW SW SW SW SW SW SW SW SW SW
20 FT wind spd..10 10 10 11 9 9 9 8 6 6 6 6
20 FT wind gust.17 16 16 17 14 14 14 13 10 8 8 8
Ridge wind dir..SW SW SW SW SW SW SW SW SW SW SW SW
Ridge wind spd..20 15 15 20 15 15 15 15 15 10 10 10
Mix hgt (kft)...9.0 5.0 3.5 2.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W W SW W W W W W W W SW SW
Transp wind spd.20 17 17 18 16 16 16 15 13 12 12 12
SDspl kt-ft/1000152 72 51 31 8 8 7 7 6 5 5 5
.MONDAY...
Sky/weather.........Sunny (15-25 percent) then becoming mostly
sunny (45-55 percent). Areas of smoke early in
the morning, then patchy smoke early in the
morning. Isolated showers and thunderstorms
early in the afternoon. Isolated dry
thunderstorms late in the afternoon.
CWR.................0 percent.
Chance of pcpn......20 percent.
Chance of thunder...15 percent.
Max temperature.....Around 88.
Min humidity........13 percent.
Wind (20 ft)........Light winds until 1100, then west 10 to 15 mph
with gusts to around 25 mph. Gusty and erratic
winds expected near thunderstorms in the
afternoon.
Ridgetop wind.......Southwest 15 to 20 mph until 1100 with gusts
up to 25 to 30 mph.
Mixing height.......2000 ft AGL until 1100, then 5500 ft AGL until
1300, then 10500 ft AGL there after.
Transport winds.....West 10 to 15 mph until 1100, then 20 to 25 mph.
Smoke dispersal.....Poor until 1100, then excellent.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........20 30 15 10 10 10 15 15 20 60 35 45
Weather cov.....ARS ARS PTY PTY PTY PTY ISO ISO ISO PTY PTY PTY
Weather type....SMK SMK SMK SMK SMK SMK RW RW RW SMK SMK SMK
Tstm cov........ ISO ISO ISO ISO ISO ISO
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 10 10 10 20 20 20 20
Chc of thdr (%).0 0 0 0 0 0 10 10 10 20 20 20
Temp............63 65 69 72 78 81 83 86 86 87 88 86
RH..............33 31 28 25 20 18 16 15 14 13 13 13
20 FT wind dir..SW SW W NW S W W W W W W NW
20 FT wind spd..6 6 4 4 5 6 11 12 11 17 13 12
20 FT wind gust.8 10 6 6 7 10 17 18 17 25 19 18
Ridge wind dir..SW SW W NW S W W W W W W NW
Ridge wind spd..10 15 10 10 10 15 20 20 20 25 20 20
Mix hgt (kft)...0.5 0.5 0.5 2.0 5.5 11 13 14 14 13 10 9.5
Transp wind dir.SW SW SW W W W W W W W W W
Transp wind spd.12 13 9 9 12 17 20 20 20 25 21 20
SDspl kt-ft/10005 5 5 16 53 155 211 228 236 284 182 165
.FORECAST DAYS 3 THROUGH 5...
.TUESDAY...
Partly cloudy. Patchy smoke in the evening, then areas of smoke.
Lows in the mid 60s. Highs in the upper 80s. West winds around
8 mph.
.WEDNESDAY...
Mostly cloudy. Lows in the mid 60s. Highs in the lower 80s. Light
winds.
.THURSDAY...
Mostly cloudy. Showers likely and chance of thunderstorms. Lows
in the upper 50s. Highs in the mid 70s. Light winds.
$$
Forecaster...Lowe
Requested by...Shelby Bell
Type of request...WILDFIRE
.TAG 2619324.0/RIW
.DELDT 08/09/26
.FormatterVersion 2.0.0
.EMAIL wycdc@firenet.gov,jellington@blm.gov,choffman@blm.gov