603
FNUS75 KSLC 021327
FWSSLC

Spot Forecast for 12 Mile Piles...USFS
National Weather Service Salt Lake City UT
627 AM MST Sun Nov 2 2025

Forecast is based on ignition time of 0811 MST on November 02.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...High pressure will maintain dry and stable
conditions at the burn site today with light, terrain-driven
diurnal winds and clear skies. Temperatures today will trend a
bit warmer with similar humidities compared to yesterday. Mixing
will remain poor today. A weak but dry weather disturbance
crossing the area tomorrow will bring increased mixing, with an
increase in southwesterly flow. High clouds will fill in tonight
into tomorrow morning with this system. Expect a slight cooling
trend tomorrow with very subtle changes in humidity. Good mixing
will continue on Tuesday as southwesterly flow remains somewhat
enhanced. The next storm system is then expected to bring
stronger southwesterly flow on Wednesday before a cold front
arrives on Thursday. Any precipitation is currently expected to
remain north of the burn site.

.REST OF TODAY...

Sky/weather.........Sunny (0-5 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....57-60.
Min humidity........16-19 percent.
Wind (20 ft)........Downslope winds 2-6 mph becoming upslope 4-9
                    mph after noon.
Mixing height.......2200 ft AGL.
   Climatology......30-40th Percentile.
Transport winds.....West 9 to 10 mph.
Clearing index......260.

.TONIGHT...

Sky/weather.........Mostly clear (25-35 percent cloud cover) then
                    becoming mostly cloudy (70-80 percent cloud
                    cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Min temperature.....42-45.
Max humidity........28-31 percent.
Wind (20 ft)........Upslope winds 3-6 mph becoming downslope 2-5 mph
                    after 2000.
Mixing height.......0 ft AGL.
Transport winds.....South 6 to 8 mph.

.MONDAY...

Sky/weather.........Partly cloudy (40-50 percent cloud cover) then
                    becoming mostly sunny (0-10 percent cloud
                    cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....55-58.
Min humidity........18-21 percent.
Wind (20 ft)........Downslope winds 2-6 mph becoming west-southwest
                    6-12 mph with gusts to around 20 mph after 1100.
Mixing height.......5100 ft AGL.
   Climatology......40-50th Percentile.
Transport winds.....South around 14 mph becoming west around 21 mph
                    in the afternoon.
Clearing index......1000+.

$$
Forecaster...Cheng
Requested by...Karson Sorenson
Type of request...PRESCRIBED
.TAG 2524540.5/SLC
.DELDT 11/02/25
.FormatterVersion 2.0.0
.EMAIL ronald.sorenson@usda.gov