891
FNUS75 KSLC 222116
FWSSLC

Spot Forecast for Lazy 8...Box Elder County Fire Marshals office
National Weather Service Salt Lake City UT
216 PM MST Sat Nov 22 2025

Forecast is based on ignition time of 0500 MST on November 24.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Weak high pressure over northwest Utah Sunday night
into early Monday morning will shift east ahead of an approaching
trough. This trough is expected to end up just grazing northern
Utah on Monday. However, it will still push a cold front through
the burn site Monday afternoon, although currently this front
looks fairly dry. Expect northwesterly downslope winds to be
enhanced behind the front later Monday afternoon into Monday
night. Good mixing can be expected especially near and behind the
cold front Monday afternoon. By Tuesday, as the storm system
exits the area, high pressure will start to build back into the
area. With cooler and more stable conditions, mixing conditions
are expected to decrease for Tuesday, with clearing index below
500.

.MONDAY...

Sky/weather.........Partly cloudy (45-55 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of lightning.0 percent.
Max temperature.....40-43.
Min humidity........53-56 percent.
Wind (20 ft)........Northwest winds 2-6 mph increasing to 6-12 mph
                    with gusts to around 22 mph after 1500.
Mixing height.......3900 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....West around 8 mph becoming northwest around 23
                    mph in the afternoon.
Clearing index......790.

.MONDAY NIGHT...

Sky/weather.........Partly cloudy (40-50 percent cloud cover) becoming
                    mostly clear (25-35 percent cloud cover).
CWR.................0 percent.
Chance of pcpn......10 percent.
Chance of lightning.0 percent.
Min temperature.....20-23.
Max humidity........58-61 percent.
Wind (20 ft)........Northwest winds 8-15 mph with gusts to around 25
                    mph decreasing to 6-12 mph with gusts to around
                    20 mph after midnight.
Mixing height.......0 ft AGL.
Transport winds.....Northwest 14 to 20 mph.

.TUESDAY...

Sky/weather.........Partly cloudy (30-40 percent cloud cover) then
                    becoming mostly sunny (25-35 percent cloud
                    cover).
CWR.................0 percent.
Chance of pcpn......0 percent.
Chance of lightning.0 percent.
Max temperature.....34-37.
Min humidity........43-46 percent.
Wind (20 ft)........Northwest winds 5-10 mph becoming upslope/upvalley
                    4-7 mph in the afternoon.
Mixing height.......2600 ft AGL.
   Climatology......20-30th Percentile.
Transport winds.....Northwest around 9 mph.
Clearing index......220.

$$
Forecaster...Cheng
Requested by...Spencer Newman
Type of request...PRESCRIBED
.TAG 2526521.0/SLC
.DELDT 11/22/25
.FormatterVersion 2.0.0
.EMAIL snewman@boxeldercountyut.gov