565
FNUS75 KSLC 280031
FWSSLC

Spot Forecast for Spring Branch...State
National Weather Service Salt Lake City UT
631 PM MDT Thu Aug 27 2026

Forecast is based on forecast start time of 1800 MDT on August 27.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Daily showers and thunderstorms will continue
over/near the burn site Friday through Saturday. Shower and
thunderstorm chances will be greater Saturday compared to Friday
as instability increases ahead of a storm system crossing the
Pacific Northwest. Increased flow aloft will also help produce stronger
storms on Saturday which will result in stronger outflow winds as
well as a small potential (10% chance) for hail. With the increase
in thunderstorm activity, temperatures will trend cooler and
humidities higher through the Saturday.

.FRIDAY...

Sky/weather.........Mostly cloudy (65-75 percent cloud cover) then
                    becoming partly cloudy (60-70 percent cloud
                    cover). Isolated showers after noon, then
                    scattered showers and isolated thunderstorms
                    after 1500.
CWR.................10 percent.
Chance of pcpn......30 percent.
Chance of lightning.20 percent.
Max temperature.....83-86.
Min humidity........22-25 percent.
Wind (20 ft)........West winds 5 to 10 mph becoming southwest 10 to
                    15 mph with gusts up to 28 mph after noon. Erratic
                    winds with gusts in excess of 40 mph possible near
                    thunderstorms in the afternoon.
Mixing height.......10900 ft AGL (70-80th Percentile).
Transport winds.....Southwest 18 to 23 mph.

.FRIDAY NIGHT...

Sky/weather.........Mostly cloudy (70-80 percent cloud cover) then
                    becoming partly cloudy (50-60 percent cloud
                    cover). Isolated thunderstorms until 2100.
                    Isolated showers through the night.
CWR.................5 percent.
Chance of pcpn......20 percent.
Chance of lightning.15 percent.
Min temperature.....64-67.
Max humidity........51-54 percent.
Wind (20 ft)........Southwest winds 10 to 15 mph with gusts to
                    around 24 mph becoming west 5 to 10 mph after
                    2000. Gusty and erratic winds expected
                    near thunderstorms early in the evening.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 16 to 22 mph.

.SATURDAY...

Sky/weather.........Partly cloudy (40-50 percent cloud cover) then
                    becoming mostly cloudy (80-90 percent cloud
                    cover). Isolated showers in the morning, then
                    numerous showers and scattered thunderstorms in
                    the afternoon.
CWR.................25 percent.
Chance of pcpn......70 percent.
Chance of lightning.35 percent.
Max temperature.....79-82.
Min humidity........32-35 percent.
Wind (20 ft)........West winds 5 to 10 mph becoming southwest 10 to
                    18 mph with gusts up to 32 mph in the afternoon.
                    Erratic winds with gusts in excess of 50 mph
                    possible near thunderstorms in the afternoon.
Mixing height.......11200 ft AGL (80-90th Percentile).
Transport winds.....Southwest around 15 mph becoming around 25 mph
                    in the afternoon.

$$
Forecaster...Cheng
Requested by...Copeland Anderson
Type of request...WILDFIRE
.TAG 2620753.0/SLC
.DELDT 08/27/26
.FormatterVersion 2.0.0
.EMAIL copelandanderson@utah.gov,hayden.bond@usda.gov