435
FNUS75 KRIW 042116
FWSRIW

Spot Forecast for Horse Fire...USFS
National Weather Service Riverton WY
316 PM MDT Fri Jul 4 2025

Forecast is based on forecast start time of 0700 MDT on July 05.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

Light winds with a favorable south direction starts the day. Winds
become west-southwest around 1100L. Afternoon winds increase to
around 15 mph, with gusts 20 to 25 mph. There is a 20% to 25% chance
of thunderstorms between noon and 1700L. Gusty outflow winds around
40 mph are possible if a storm moves over the area. Drier air also
moves in, so afternoon RHs are lower compared to the previous day,
with a value in the low 30 percents. The drying trend then continues
through the weekend and into the start of next week. Temperatures
also trend a few degrees higher each day. There is a near zero
percent chance of rain through Monday.

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

.SATURDAY...

Sky/weather.........Sunny (15-25 percent). Isolated showers and
                    thunderstorms in the afternoon.
CWR.................0 percent.
Chance of pcpn......25 percent.
Chance of thunder...25 percent.
Max temperature.....Around 68.
Min humidity........30-34 percent.
Wind (20 ft)........Light south-favored winds until 1000, then southwest
                    around 10 mph with gusts to around 15 mph until 1300,
                    then west around 15 mph with gusts around 20 to 25 mph.
                    Gusty and erratic winds expected near thunderstorms in
                    the afternoon.
Ridgetop wind.......Northwest around 10 mph until 0800, then south
                    until 1100, then west 15 to 20 mph until 1600,
                    then 20 to 25 mph.
Mixing height.......2000 ft AGL until 1000. 7000 ft AGL after 1200.
Transport winds.....Southwest 10 to 15 mph until 1200, then 20 to
                    30 mph.
Smoke dispersal.....Poor until 0900. Excellent after 1600.


.SATURDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent).
Chance of pcpn......10 percent until 1900, then 0 percent.
Chance of thunder...10 percent.
Min temperature.....Around 45.
Max humidity........55-59 percent.
Wind (20 ft)........West winds 10 to 15 mph with gusts to around 20
                    mph until 2200, then light west winds around 5 mph.
Mixing height.......7000 ft AGL until 1900. 500 ft AGL after 2000.
Transport winds.....West 15 to 25 mph until 2200. Around 8 mph
                    after 0400.
Smoke dispersal.....Very good until 1900. Poor after 2100.


.SUNDAY...

Sky/weather.........Sunny (5-15 percent).
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 70.
Min humidity........25-28 percent.
Wind (20 ft)........Light west winds until 1100, then west around
                    10 mph with gusts to around 20 mph through the
                    afternoon.
Mixing height.......1500 ft AGL until 0900. 8500 ft AGL after 1300.
Transport winds.....Southwest 10 to 15 mph until 1200, then west
                    around 20 mph.
Smoke dispersal.....Poor until 0800. Very good after 1200.


.FORECAST DAYS 3 THROUGH 5...
.MONDAY...
Mostly clear. Lows in the mid 40s. Highs in the lower 70s. West
winds around 10 mph, with afternoon gusts around 20 mph.
Afternoon RH around 22 percent.
.TUESDAY...
Mostly clear. Lows in the upper 40s. Highs in the mid 70s.
West-southwest winds around 10 mph, with afternoon gusts
15 to 20 mph. Afternoon RH around 20 percent.
.WEDNESDAY...
Mostly clear. Lows in the lower 50s. Highs in the upper 70s.
West winds around 10 mph, with afternoon gusts around 20 mph.
Afternoon RH around 18 percent.

$$
Forecaster...Wittmann
Requested by...Rebecca Hird
Type of request...WILDFIRE
.TAG 2516836.6/RIW
.DELDT 07/04/25
.FormatterVersion 2.0.0
.EMAIL rhird@blm.gov,nws.riverton@noaa.gov