159
FNUS75 KRIW 172123
FWSRIW

Spot Forecast for Horse...WYBTF
National Weather Service Riverton WY
323 PM MDT Tue Jun 17 2025

Forecast is based on forecast start time of 0700 MDT on June 18.
If conditions become unrepresentative, contact the National Weather
Service

.DISCUSSION...

High pressure will build into the area on Wednesday. This will make
for slightly warmer and drier conditions under mostly sunny skies.
Expect the morning inversion to begin lifting by 0900, followed by a
breezy west-northwest wind developing after 1100. Wind will
transition back to downslope/downvalley after sunset. Temperature
climbs and humidity drops further on Thursday, with a gusty
southwest wind by late morning. Additionally, expect increased
instability on Thursday as mixing heights rise above 10,000 ft AGL.
Similar conditions are expected on Friday. No precipitation is
expected through the end of the week.

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

.WEDNESDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 67.
Min humidity........27 percent.
Wind (20 ft)........Light winds until 1100, then west 7 to 13 mph
                    with gusts to around 19 mph.
Ridgetop wind.......West 10 to 15 mph until 1300, then around 20
                    mph.
Mixing height.......1000 ft AGL increasing to 7500 ft AGL after 1300.
Transport winds.....West 10 to 18 mph until 1400, then 20 to 21
                    mph.
Smoke dispersal.....Poor until 0900, increasing to very good after 1200.

.WEDNESDAY NIGHT...

Sky/weather.........Clear (0-10 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 46.
Max humidity........50 percent.
Wind (20 ft)........West winds 7 to 12 mph with gusts to around 18
                    mph until 2100, then light downslope/downvalley.
Ridgetop wind.......West 15 to 20 mph until 2100, then southwest
                    around 10 mph.
Mixing height.......5000 ft AGL until 2000, then 500 ft AGL.
Transport winds.....West 12 to 20 mph until 2200, then southwest 10
                    to 12 mph.
Smoke dispersal.....Decreasing to poor after 2100.

.THURSDAY - JUNETEENTH...

Sky/weather.........Sunny (5-15 percent).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 76.
Min humidity........18 percent.
Wind (20 ft)........Light winds until 0800. Winds southwest 13 to
                    15 mph with gusts to around 25 mph after 1400.
Ridgetop wind.......South 10 to 15 mph until 1200, then southwest
                    20 to 25 mph.
Mixing height.......Increasing to 12000 ft AGL after 1200.
                    1200.
Transport winds.....Southwest 12 to 17 mph until 1100, then 20 to 30
mph after 1200.
Smoke dispersal.....Increasing to excellent by 1200.

.FORECAST DAYS 3 THROUGH 5...
.FRIDAY...
Mostly clear. Lows in the lower 50s. Highs in the lower 70s.
Minimum humidity around 20 percent. Southwest winds 12 to 18 mph
gusting 25 to 30 mph in the afternoon.
.SATURDAY...
Clear. Lows in the mid 40s. Highs in the mid 60s. Minimum humidity
around 25 percent. Southwest winds around 10 to 12 mph in the
late morning, becoming west around 15 mph in the late afternoon,
with a possible cold front starting to push through from the west
late in the afternoon.
.SUNDAY...
Mostly clear. Lows in the mid 30s. Highs in the mid 50s. Minimum
humidity around 30 percent. West winds around 13 mph.

$$
Forecaster...Myers
Requested by...Anna Sammer, PSC3
Type of request...WILDFIRE
.TAG 2515958.4/RIW
.DELDT 06/17/25
.FormatterVersion 2.0.0
.EMAIL anna_sammer@firenet.gov