445
FNUS75 KSLC 121137
FWSSLC

Spot Forecast for New Canyon RX...USFS
National Weather Service Salt Lake City UT
437 AM MST Wed Nov 12 2025

Forecast is based on ignition time of 0800 MST on November 12.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...High pressure remains the dominant feature over the
region today, though will gradually begin breaking down as a
weather system approaches the west coast. This pattern will bring
increasing southwesterly winds aloft today, with a slight
improvement in mixing is expected as a result. However, clearing
index values are expected to remain below 500 as these winds
will not be enough to fully scour the strong inversion conditions
already in place. Surface winds gradually increase into Thursday,
with wind gusts peaking around 15-20 mph on Thursday afternoon.

Weak moisture transport into the region early Friday on the
fringes of a low pressure system off the coast of southern
California may lead to some scattered rain showers through Friday
afternoon, though any accumulations during this period are
expected to remain light. The low pressure system initially off
the coast is expected to move inland Sunday into early next week,
which will bring better chances for wetting rains and potential
for accumulating snowfall. There is a good amount of uncertainty
in potential accumulations due to variability in the storm track,
though generally cooler and wetter conditions can be expected
Sunday into early next week.

.REST OF TODAY...

Sky/weather.........Partly cloudy (50-60 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....51-53.
Min humidity........27-29 percent.
Wind (20 ft)........Southwest winds 3-6 mph becoming west 6-11
                    mph late in the morning.
Mixing height.......3200 ft AGL.
   Climatology......30-40th Percentile.
Transport winds.....Southwest 10 to 15 mph.
Clearing index......420.

.TONIGHT...

Sky/weather.........Partly cloudy (50-60 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Min temperature.....Around 40.
Max humidity........42-44 percent.
Wind (20 ft)........Southwest winds 5-8 mph becoming south 6-8 mph
                    early in the morning.
Mixing height.......0 ft AGL.
Transport winds.....Southwest around 12 mph.

.THURSDAY...

Sky/weather.........Mostly sunny (15-25 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....51-53.
Min humidity........33-35 percent.
Wind (20 ft)........South winds 6-8 mph becoming southwest 6-12 mph
                    with gusts to 20 mph late in the morning.
Mixing height.......4800 ft AGL.
   Climatology......30-40th Percentile.
Transport winds.....Southwest 21 to 22 mph.
Clearing index......900.

$$
Forecaster...Whitlam
Requested by...Karson Sorenson
Type of request...PRESCRIBED
.TAG 2525595.1/SLC
.DELDT 11/12/25
.FormatterVersion 2.0.0
.EMAIL ronald.sorenson@usda.gov,kyler.hatch@usda.gov