456
FNUS75 KSLC 141220
FWSSLC

Spot Forecast for Millcreek Piles RX...USFS
National Weather Service Salt Lake City UT
620 AM MDT Tue Oct 14 2025

Forecast is based on ignition time of 0800 MDT on October 15.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Fairly widespread rain showers will fill in over
the burn site late tonight into through Wednesday as a storm
system moves into Utah. Coverage and intensity of precipitation
will then begin to decrease after around 1500-1600 Wednesday, but
as cooler air works its way in behind a cold front, snow levels
will lower, allowing snow to mix with rain during the afternoon
before transitioning to all snow Wednesday night. Occasional snow
showers will then continue through Thursday before tapering off.
Between 0.5-1.25 inches of precipitation can be expected from
Tuesday evening through Thursday evening, with 3-7 inches of snow.
Winds will increase for several hours Wednesday afternoon out of
the west-southwest behind a cold front, otherwise winds are
expected to remain generally on the light side. Mixing
conditions will be excellent on Wednesday, but as cooler and more
stable air settles into the area Thursday along with lighter
winds, expect mixing to be reduced.


.WEDNESDAY...

Sky/weather.........Mostly cloudy (85-95 percent cloud cover). Rain
                    showers and chance of thunderstorms early in
                    the morning, then rain and now showers and a
                    slight chance of thunderstorms in the
                    afternoon.
CWR.................85 percent.
Chance of pcpn......90 percent.
Chance of lightning.30 percent decreasing to 20 percent in the afternoon.
Max temperature.....39-42.
Min humidity........84-87 percent.
Wind (20 ft)........Downslope/downcanyon winds 3-6 mph becoming
                    southwest 4-9 mph after 1000, then becoming
                    west-southwest 11-16 with gusts to around 25 mph
                    after noon.
                    Gusty and erratic winds expected near thunderstorms.
Mixing height.......2800 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....South 17 to 20 mph.
Clearing index......900.

.WEDNESDAY NIGHT...

Sky/weather.........Mostly cloudy (75-85 percent cloud cover).
                    Slight chance of thunderstorms early in the
                    evening. Snow showers likely through the night.
CWR.................50 percent.
Chance of pcpn......60 percent.
Chance of lightning.10 percent.
Min temperature.....Around 30.
Max humidity........97-100 percent.
Wind (20 ft)........West-southwest winds 3-7 mph becoming
                    downslope/downcanyon 2-6 mph after 2100.
                    Gusty and erratic winds expected near thunderstorms.
Mixing height.......300 ft AGL.
Transport winds.....Southwest 13 to 15 mph.

.THURSDAY...

Sky/weather.........Mostly cloudy (85-95 percent cloud cover). Snow
                    showers likely.
CWR.................40 percent.
Chance of pcpn......60 percent.
Chance of lightning.10 percent.
Max temperature.....32-35.
Min humidity........89-92 percent.
Wind (20 ft)........Downslope/downcanyon winds 2-6 mph becoming west-
                    southwest 3-7 mph after 0900, then becoming west 4-9
                    mph in the afternoon.
Mixing height.......1200 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....Southwest around 12 mph.
Clearing index......220.

$$
Forecaster...Cheng
Requested by...Peter Noble
Type of request...PRESCRIBED
.TAG 2523539.0/SLC
.DELDT 10/14/25
.FormatterVersion 2.0.0
.EMAIL peter.noble@usda.gov