758
FNUS75 KRIW 221837
FWSRIW

Spot Forecast for Dollar Fire...USFS
National Weather Service Riverton WY
1237 PM MDT Fri Aug 22 2025

Forecast is based on forecast start time of 1300 MDT on August 22.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Winds are expected to gradually increase this afternoon from the
west/northwest at around 10 to 15 mph with periodic gusts near 20
mph. Showers and thunderstorms will be possible this afternoon and
evening. However, chances will be minimal ranging from 10 to 20
percent. The main concern with any nearby developing showers or
storms will be strong gusty outflow winds of 25 to 35 mph. Min RH is
expected to remain low around 20 percent for Friday and Saturday.
Winds lighten overnight becoming mostly light and variable. Another
increase in winds is expected during the day Saturday, however from
the southwest/west. Precipitation chances remain low (<10%) for
Saturday with better chances arriving by Sunday.

...Thunderstorms imply strong gusty and erratic winds...

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...9 percent.
Max temperature.....Around 81.
Min humidity........17 percent.
Wind (20 ft)........West winds around 8 mph with gusts to around 13
                    mph.
Ridgetop wind.......West around 15 mph.
Mixing height.......12500 ft AGL.
Transport winds.....West 15 to 18 mph.
Smoke dispersal.....Excellent.

TIME (MDT)      1 PM      4 PM
Sky (%).........20        35
Weather cov.....
Weather type....
Tstm cov........
CWR.............0         0
Chc of pcpn (%).0         10
Chc of thdr (%).0         10
Temp............77        79
RH..............20        18
20 FT wind......W 8G13    W 8G13
Ridgetop wind...W 15      W 15
Mix hgt (ft)....12000     12500
Transport wind..W 18      W 17
SDspl kt-ft/1000192       188

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...4 percent.
Min temperature.....Around 42.
Max humidity........91 percent.
Wind (20 ft)........West winds around 7 mph until 1900, then light.
Ridgetop wind.......Northwest 10 to 15 mph until 2200, then north
                    until 0200, then northwest until 0500, then
                    light.
Mixing height.......11500 ft AGL until 1900. 1500 ft AGL after
                    2100.
Transport winds.....West 12 to 14 mph until 2000. East 7 to 12 mph
                    after 2200.
Smoke dispersal.....Very good until 1900. Poor after 2100.

TIME (MDT)      6 PM      9 PM      MIDNGT    3 AM
Sky (%).........20        15        10        15
Weather cov.....
Weather type....
Tstm cov........
CWR.............0         0         0         0
Chc of pcpn (%).0         0         0         0
Chc of thdr (%).0         0         0         0
Temp............79        63        52        46
RH..............17        38        67        85
20 FT wind......W 7G11    N 6G8     N 6G8     NW 3G5
Ridgetop wind...W 15      N 10      N 10      NW 10
Mix hgt (ft)....11500     1500      1500      1500
Transport wind..W 14      NE 12     E 12      E 8
SDspl kt-ft/1000136       17        16        11

.SATURDAY...

Sky/weather.........Sunny (20-30 percent).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of thunder...7 percent.
Max temperature.....Around 80.
Min humidity........17 percent.
Wind (20 ft)........Light winds until 1100, then southwest 8 to 9
                    mph with gusts to around 14 mph until 1500,
                    then west 7 to 8 mph with gusts to around 13
                    mph.
Ridgetop wind.......Light winds until 1000, then southwest around
                    15 mph until 1700, then west.
Mixing height.......2500 ft AGL until 1000. 11500 ft AGL after
                    1500.
Transport winds.....Southeast around 7 mph until 0900. West 15 to
                    16 mph after 1200.
Smoke dispersal.....Poor until 1000. Very good early in the morning
                    increasing to excellent in the afternoon after
                    1300.

TIME (MDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........20        5         10        25
Weather cov.....
Weather type....
Tstm cov........
CWR.............0         0         0         0
Chc of pcpn (%).0         0         10        10
Chc of thdr (%).0         0         10        10
Temp............43        48        72        78
RH..............91        84        35        21
20 FT wind......NW 2      W 2       S 8G12    W 8G13
Ridgetop wind...NW 5      W 5       S 15      W 15
Mix hgt (ft)....1500      2500      7000      11500
Transport wind..SE 7      S 7       W 15      W 16
SDspl kt-ft/100010        14        93        161

.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...
Mostly cloudy. Areas of smoke. Scattered showers and
thunderstorms. Lows in the mid 40s. Highs in the upper 70s. Light
winds.
.MONDAY...
Mostly cloudy. Numerous showers and scattered thunderstorms. Lows
in the mid 40s. Highs in the lower 70s. Light winds.
.TUESDAY...
Mostly cloudy. Numerous showers and scattered thunderstorms. Lows
in the lower 40s. Highs in the lower 70s. Light winds.

$$
Forecaster...Dziewaltowski
Requested by...Michael Dolan
Type of request...WILDFIRE
.TAG 2520462.0/RIW
.DELDT 08/22/25
.FormatterVersion 2.0.0
.EMAIL michael_dolan@firenet.gov