513
FNUS75 KSLC 172209
FWSSLC

Spot Forecast for D4 Piles...US Forest Service
National Weather Service Salt Lake City UT
309 PM MST Mon Nov 17 2025

Forecast is based on ignition time of 1500 MST on November 17.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...A storm system will approach from the southwest tonight
and build into the area early Tuesday. Snow will be moderate to
heavy much of Tuesday. Snowfall accumulation will range from 6-12
inches through Tuesday with 0.5-1.0 inches of water. A combination
of light transport winds and lower mixing heights will limit
clearing to below 500. Clearing will increase some the next day,
but likely be below 500, as there will be better mixing. Another
3-8 inches of snow and 0.25-0.75 inches of water is likely. Storm
total snow will most likely range from 12-18 inches with 1.0-1.5
inches of water content.

.TONIGHT...

Sky/weather.........Partly cloudy (55-65 percent cloud cover) then
                    becoming mostly cloudy (75-85 percent cloud
                    cover). Slight chance of snow late in the
                    evening. Chance of snow early in the morning.
CWR.................10 percent.
Chance of pcpn......40 percent.
Chance of lightning.0 percent.
Min temperature.....Around 20.
Max humidity........100 percent.
Wind (20 ft)........South winds 5-10 mph becoming southeast 5-10 mph
                    early in the morning.
Mixing height.......0 ft AGL.
Transport winds.....South 10 mph.

.TUESDAY...

Sky/weather.........Mostly cloudy (85-95 percent cloud cover).
                    Snow.
CWR.................80 percent.
Chance of pcpn......90 percent.
Chance of lightning.5 percent.
Max temperature.....29-31.
Min humidity........95-100 percent.
Wind (20 ft)........Southeast winds 5-10 mph.
Mixing height.......800 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....Southeast 15 to 16 mph.
Clearing index......160.

$$
Forecaster...Wilson
Requested by...Shane Woolsey
Type of request...PRESCRIBED
.TAG 2526181.0/SLC
.DELDT 11/17/25
.FormatterVersion 2.0.0
.EMAIL shane.woolsey@usda.gov