463
FNUS75 KSLC 122033
FWSSLC

Spot Forecast for Gap Fire...USFS
National Weather Service Salt Lake City UT
233 PM MDT Sat Jul 12 2025

Forecast is based on forecast start time of 0600 MDT on July 13.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Heat will continue to build into the region over the next couple
of days, bringing an increase of about 1 to 3 degrees in daily
high temperatures through at least Tuesday. Heat Risk is expected to increase
to "high" (level 4 of 5) on Sunday for the lower elevations around the
fire, indicating a substantial increase in heat related illness potential. High
Heat Risk is expected to continue through Tuesday. In addition to
increasing heat, dry conditions will remain in place each day with
relative humidity dropping to as low as the upper single-digits
to low-teens. Overnight humidity recoveries are expected to be
below 30 percent through at least Tuesday, especially within the
thermal belt (roughly 300-700ft AGL). Higher humidity is expected
on the valley bottom. Winds remain terrain driven during the overnight
and early morning hours, with north to northwest winds favored during
the afternoon.


.SUNDAY...

Sky/weather.........Sunny (0-10 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.1 percent.
Max temperature.....95-98.
Min humidity........9-11 percent.
Wind (20 ft)........Terrain driven (downslope) 3-6 mph in the morning,
then becoming northwest 6-10 mph in the late morning
/early afternoon. Gusts around 15 mph.
Mixing height.......14000 ft AGL
   Climatology......97-99th Percentile.
Transport winds.....North 9 to 15 mph.

.SUNDAY NIGHT...

Sky/weather.........Mostly clear (5-15 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.1 percent.
Min temperature.....64-66.
Max humidity........23-25 percent on the slopes and ridges.
Around 40 percent for valley bottoms.
Wind (20 ft)........Northwest winds 6-10 mph before sunset, then
becoming terrain driven (downslope) 4-7 mph
                    overnight.
Transport winds.....North 7 to 15 mph.

.MONDAY...

Sky/weather.........Mostly sunny (15-25 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.3 percent.
Max temperature.....96-99.
Min humidity........9-11 percent.
Wind (20 ft)........Terrain driven (downslope) 3-6 mph in the morning,
becoming northwest 6-10 mph in the afternoon.
Mixing height.......16100 ft AGL
   Climatology......95-97th Percentile.
Transport winds.....Northeast around 8 mph becoming northwest
                    around 15 mph in the afternoon.

$$
Forecaster...Webber
Requested by...Sierra Sampson
Type of request...WILDFIRE
.TAG 2517867.0/SLC
.DELDT 07/12/25
.FormatterVersion 2.0.0
.EMAIL sierra.sampson@usda.gov