Spot Forecast
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
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FNUS75 KRIW 220307
FWSRIW
Spot Forecast for Dollar Lake...IA TDC
National Weather Service Riverton WY
907 PM MDT Thu Aug 21 2025
Forecast is based on forecast start time of 2100 MDT on August 21.
If conditions become unrepresentative, contact the National Weather
Service
.DISCUSSION...
Dry conditions expected tonight and Friday. There is a 10% chance
for showers through the afternoon Friday, but confidence remains
low for even this amount. Winds will remain light tonight from the
north, turning morning westerly after 1200 Friday. Skies will
become more partly cloudy after 0900. Conditions are expected to
remain dry Saturday.
...Thunderstorms imply strong gusty and erratic winds...
.REST OF TONIGHT...
Sky/weather.........Mostly cloudy (55-65 percent) then becoming
partly cloudy (40-50 percent) by 2300. Haze
through 2200.
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...1 percent.
Min temperature.....Around 43.
Max humidity........71 percent.
Wind (20 ft)........Light winds.
Ridgetop wind.......North around 10 mph.
Mixing height.......1500 ft AGL.
Transport winds.....West around 8 mph until 2200, then north until
2300, then south 8 to 9 mph.
Smoke dispersal.....Poor.
TIME (MDT) 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........60 50 35 40 40 40 40 35 35
Weather cov.....DEF DEF
Weather type....HAZ HAZ
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0
Chc of pcpn (%).0 0 0 0 0 0 0 0 0
Chc of thdr (%).0 0 0 0 0 0 0 0 0
Temp............64 59 56 53 51 49 47 46 45
RH..............39 45 49 55 61 61 67 69 71
20 FT wind dir..NW NE NE N N N N N N
20 FT wind spd..3 3 3 3 3 3 4 4 3
20 FT wind gust.5 5 5 5 5 5 6 6 5
Ridge wind dir..NW NE NE N N N N N N
Ridge wind spd..10 10 10 10 10 10 10 10 10
Mix hgt (kft)...1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Transp wind dir.W N SE S S S SE SE S
Transp wind spd.8 8 8 8 8 8 9 9 8
SDspl kt-ft/100012 12 12 12 12 12 13 13 12
.FRIDAY...
Sky/weather.........Mostly sunny (30-40 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...8 percent.
Max temperature.....Around 80.
Min humidity........16 percent.
Wind (20 ft)........Light winds until 1200, then west 8 to 10 mph
with gusts to around 16 mph.
Ridgetop wind.......North around 10 mph until 0900, then southwest.
Mixing height.......2000 ft AGL until 1000. 12500 ft AGL after
1200.
Transport winds.....Southeast around 8 mph until 0900, then
southwest 8 to 16 mph until 1200, then west 17
to 22 mph.
Smoke dispersal.....Poor until 1000. Excellent after 1200.
TIME (MDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........30 40 25 20 20 25 20 30 25 35 45 40
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 10 10 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 10 10 10 10 10 10
Temp............44 43 45 50 61 70 74 77 78 77 78 80
RH..............71 71 71 61 41 28 22 20 19 18 16 16
20 FT wind dir..N N N SW S S SW W W W W W
20 FT wind spd..3 3 3 3 5 6 8 9 9 10 8 8
20 FT wind gust.5 5 5 5 7 10 13 14 14 16 13 13
Ridge wind dir..N N N SW S S SW W W W W W
Ridge wind spd..10 10 10 10 10 15 15 15 15 15 15 15
Mix hgt (kft)...1.5 1.5 1.5 2.0 4.0 7.5 11 12 12 13 13 12
Transp wind dir.SE SE S SW SW W W W W W W W
Transp wind spd.8 8 8 8 13 16 20 22 21 21 18 17
SDspl kt-ft/100012 12 11 15 45 105 186 220 216 227 197 179
.FRIDAY NIGHT...
Sky/weather.........Mostly clear (15-25 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...6 percent.
Min temperature.....Around 42.
Max humidity........96 percent.
Wind (20 ft)........Northwest winds around 7 mph until 1900, then
light.
Ridgetop wind.......Northwest around 15 mph until 2000, then
northeast until 0400, then light.
Mixing height.......11500 ft AGL until 1900. 1500 ft AGL after
2100.
Transport winds.....West 13 to 15 mph until 2000. East 7 to 10 mph
after 2300.
Smoke dispersal.....Very good until 1900. Poor after 2100.
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........20 15 20 25 20 15 10 15 15 20 20 25
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
Chc of pcpn (%).10 0 10 0 10 0 0 0 0 0 0 0
Chc of thdr (%).10 0 10 0 10 0 0 0 0 0 0 0
Temp............78 74 68 63 59 55 51 49 47 45 44 43
RH..............16 22 30 37 49 61 74 79 84 90 92 94
20 FT wind dir..NW N N NE NE NE NE NE NE NE NE E
20 FT wind spd..7 6 5 5 4 5 5 3 3 3 2 2
20 FT wind gust.11 10 7 7 6 7 7 5 5 5
Ridge wind dir..NW N N NE NE NE NE NE NE NE NE E
Ridge wind spd..15 15 10 10 10 10 10 10 10 10 5 5
Mix hgt (kft)...12 5.0 3.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Transp wind dir.W W N N NE NE E E E E E E
Transp wind spd.15 13 10 10 9 10 10 8 8 8 7 7
SDspl kt-ft/1000148 54 30 15 13 15 14 11 11 11 10 10
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...
Partly cloudy. Isolated showers and thunderstorms. Lows in the
lower 40s. Highs in the upper 70s. Light winds.
.MONDAY...
Mostly cloudy with showers and scattered thunderstorms. Lows in
the mid 40s. Highs in the upper 60s. Light winds.
.TUESDAY...
Mostly cloudy with numerous showers and scattered thunderstorms.
Lows in the lower 40s. Highs in the upper 60s. Light winds.
$$
Forecaster...LaVoie
Requested by...Anna Pence
Type of request...WILDFIRE
.TAG 2520430.0/RIW
.DELDT 08/21/25
.FormatterVersion 2.0.0
.EMAIL wytdc@firenet.gov