814
FNUS75 KSLC 261521
FWSSLC

Spot Forecast for Cottonwood 3-day...USFS
National Weather Service Salt Lake City UT
921 AM MDT Sun Jul 26 2026

Forecast is based on forecast start time of 0900 MDT on July 27.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Hot temperatures and generally light winds are expected
to remain in place over the fire area through the first half of
the week, with moisture increasing gradually each day. Though
moisture will be lowest by Monday, there is still a chance for
isolated showers and thunderstorms to develop over the Tushar
Crest, as well as the high terrain south of the fire. Overall
chances for heavy rainfall will be low on Monday and Tuesday, with
chances increasing notably by Wednesday. Moisture content is
expected to reach its peak by Wednesday, bringing the highest
chances for showers and thunderstorms over the fire area. Each
afternoon, any storms that develop are expected to do so by around
1200, with chances for showers and thunderstorms lingering
through around 2000-2100. The main concerns for storms on Monday
and Tuesday will be lightning as well as gusty and erratic outflow
winds and isolated heavy rainfall. Heavy rainfall becomes more of
a threat by Wednesday. Otherwise, anticipate light terrain driven
flows for middle and lower slopes each day with ridgetop and
upper slope winds out of the southwest around 10 mph.

.MONDAY...

Sky/weather.........Mostly sunny (20-30 percent cloud cover) then
                    becoming partly cloudy (35-45 percent cloud
                    cover). Slight chance of showers and
                    thunderstorms after 1200.
CWR.................10 percent.
Chance of pcpn......30 percent.
Chance of lightning.25 percent.
Max temperature.....68-74 upper elevations. 85-89 lower elevations.
Min humidity........35-40 percent upper elevations. 20-25 percent lower
elevations.
Wind (20 ft)........Ridges: West to southwest around 10 mph
Slopes: Terrain driven 5-8 mph for sheltered. West
around 10 mph for exposed and upper slopes.
*Gusty and erratic outflows in excess of 30 mph near
thunderstorms*
Mixing height.......9500 ft AGL (70-80th Percentile).
Transport winds.....Southwest 8 to 13 mph.

.MONDAY NIGHT...

Sky/weather.........Partly cloudy (30-40 percent cloud cover). A slight
chance for showers and thunderstorms before 2000.
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of lightning.5-10 percent.
Min temperature.....Around 55 upper elevations. Around 65 lower elevations.
Max humidity........60-65 percent upper elevations. 45-50 percent lower
elevations.
Wind (20 ft)........Ridges: West to northwest 10-15 mph.
Slopes: Terrain driven 4-7 mph.
Transport winds.....Southwest 8 to 9 mph.

.TUESDAY...

Sky/weather.........Mostly sunny (25-35 percent cloud cover) then
                    becoming partly cloudy (50-60 percent cloud
                    cover). Chance of showers and thunderstorms
                    after 1200.
CWR.................5 percent.
Chance of pcpn......35 percent.
Chance of lightning.30 percent.
Max temperature.....70-75 upper elevations. 87-91 lower elevations.
Min humidity........35-40 percent upper elevations. 25-30 percent lower
elevations.
Wind (20 ft)........Ridges: Southwest around 10 mph
Slopes: Terrain driven 5-7 mph for sheltered. Southwest
around 8-10 mph for exposed and upper slopes.
*Gusty and erratic outflows in excess of 30 mph near
thunderstorms*
Mixing height.......9900 ft AGL (80-90th Percentile).
Transport winds.....Southwest 7 to 12 mph.

.TUESDAY NIGHT...

Sky/weather.........Partly cloudy (40-50 percent cloud cover). A slight chance
for showers and thunderstorms before 2300.
CWR.................5 percent.
Chance of pcpn......15-20 percent.
Chance of lightning.15 percent.
Min temperature.....Around 55 upper elevations. Around 65 lower elevations.
Max humidity........55 percent upper elevations. 45-50 percent lower
elevations.
Wind (20 ft)........Ridges: Southwest 5-10 mph.
Slopes: Terrain driven 4-7 mph.
*Gusty and erratic outflows in excess of 30 mph near
thunderstorms*
Transport winds.....Southwest around 7 mph.

.WEDNESDAY...

Sky/weather.........Partly cloudy (40-50 percent cloud cover) then becoming
mostly cloudy (60-70 percent cloud cover) in the afternoon.
Chance for showers and thunderstorms after 1200.
CWR.................15-20 percent.
Chance of pcpn......50 percent.
Chance of lightning.45 percent.
Max temperature.....70-75 upper elevations. 86-89 lower elevations.
Min humidity........35-40 percent upper elevations. 23-27 percent lower
elevations.
Wind (20 ft)........Ridges: Southwest 5-10 mph.
Slopes: Terrain driven 4-8 mph.
*Gusty and erratic outflows in excess of 30 mph near
thunderstorms*
Mixing height.......8,500ft AGL (60-80th percentile)
Transport winds.....Southwest around 10 mph.

$$
Forecaster...Webber
Requested by...Brian Monroe
Type of request...WILDFIRE
.TAG 2618280.0/SLC
.DELDT 07/26/26
.FormatterVersion 2.0.0
.EMAIL brian.monroe@usda.gov