063
FNUS75 KSLC 201215
FWSSLC

Spot Forecast for 910 Burn Piles...State DNR FFSL
National Weather Service Salt Lake City UT
515 AM MST Thu Nov 20 2025

Forecast is based on ignition time of 0625 MST on November 20.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...An upper level low moving through the region will
continue to bring high relative humidities and excellent mixing
Thursday. Increased the clearing index forecast to 1000+ due to
the probability of measurable precipitation at the burn site (70%
chance). The upper level low will finally pull away from the
region Friday. The threat of measurable precipitation is lower on
Friday (around 50%) so adjusted the clearing index to 500 to
reflect this lower probability. Otherwise, light winds are
expected through the period.

.TODAY...

Sky/weather.........Mostly cloudy (75-85 percent cloud cover).
                    Chance of rain and snow.
CWR.................30 percent.
Chance of pcpn......50 percent.
Chance of lightning.10 percent.
Max temperature.....44-46.
Min humidity........70-75 percent.
Wind (20 ft)........East to northeast 2-6 mph becoming south to
                    southeast after 0600 becoming west to northwest
                    after 1200.
Mixing height.......2600 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....Southeast around 6 mph.
Clearing index......1000.

.TONIGHT...

Sky/weather.........Mostly cloudy (80-90 percent cloud cover).
                    Chance of rain and snow.
CWR.................20 percent.
Chance of pcpn......40 percent.
Chance of lightning.5 percent.
Min temperature.....Around 30.
Max humidity........96-100 percent.
Wind (20 ft)........Northeast to east 2-5 mph.
Mixing height.......1200 ft AGL.
Transport winds.....North around 6 mph becoming west around 7 mph
                    overnight.

.FRIDAY...

Sky/weather.........Mostly cloudy (80-90 percent cloud cover).
                    Chance of rain and snow.
CWR.................20 percent.
Chance of pcpn......40 percent.
Chance of lightning.5 percent.
Max temperature.....42-44.
Min humidity........68-73 percent.
Wind (20 ft)........East to southeast 2-5 mph becoming north to
                    northwest after 0900-1000.
Mixing height.......2400 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....North 5 to 6 mph.
Clearing index......500.

$$
Forecaster...Kruse
Requested by...Travis Wright
Type of request...PRESCRIBED
.TAG 2525937.2/SLC
.DELDT 11/20/25
.FormatterVersion 2.0.0
.EMAIL tdwright@utah.gov