987
FNUS75 KSLC 180125
FWSSLC

Spot Forecast for Second Water...NUIFC
National Weather Service Salt Lake City UT
725 PM MDT Thu Sep 17 2026

Forecast is based on forecast start time of 2000 MDT on September 17.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Widely scattered showers with a few thunderstorms
continue this evening. As of this writing, a storm near Ephraim is
moving northeast toward the fire. There is a low (20-30 percent)
chance of this storm holding together and moving over the fire in
the next 60-90 minutes. The main threats with this storm will be
gusty and erratic winds, lightning, and brief heavy rain.
Additional showers will develop during the early morning, most
likely between 3am and 5am and lasting for much of the morning.
The majority of these showers are expected to be north of the
fire, but there is a 30 percent chance of a storm impacting the
fire tomorrow morning. Showers and thunderstorms will become more
widespread in coverage tomorrow afternoon ahead of an approaching
storm system, bringing a greater threat of gusty winds and wetting
rainfall. Storms will tend to diminish tomorrow evening, with
drier air moving in, at least temporarily, for Saturday.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy (55-65 percent cloud cover) then
                    becoming mostly cloudy (65-75 percent cloud
                    cover). Chance of showers and a slight chance of
                    thunderstorms.
CWR.................35 percent.
Chance of pcpn......40 percent.
Chance of lightning.20 percent.
Min temperature.....50-54.
Max humidity........88-92 percent.
Wind (20 ft)........Southeast winds 8-12 mph. Gusty and erratic
                    winds expected near thunderstorms.
Mixing height.......600 ft AGL.
Transport winds.....Southeast winds 10-15 mph.

.FRIDAY...

Sky/weather.........Mostly cloudy (75-85 percent cloud cover).
                    Chance of rain showers and slight chance of
                    thunderstorms in the morning, then rain showers
                    likely and chance of thunderstorms in the
                    afternoon.
CWR.................70 percent.
Chance of pcpn......70 percent.
Chance of lightning.50 percent.
Max temperature.....64-68.
Min humidity........58-62 percent.
Wind (20 ft)........South winds 5-10 mph. Gusty and erratic
                    winds expected near thunderstorms.
Mixing height.......5800 ft AGL (40-50th Percentile).
Transport winds.....South winds 10-15 mph.

.FRIDAY NIGHT...

Sky/weather.........Mostly cloudy (75-85 percent cloud cover) then
                    becoming partly cloudy (50-60 percent cloud
                    cover). Rain showers likely and chance of
                    thunderstorms in the evening, then chance of
                    rain showers and slight chance of thunderstorms
                    overnight.
CWR.................35 percent.
Chance of pcpn......60 percent.
Chance of lightning.30 percent.
Min temperature.....44-48.
Max humidity........92-96 percent.
Wind (20 ft)........Downslope/downvalley winds 3-7 mph. Gusty and
                    erratic winds expected near thunderstorms.
Mixing height.......900 ft AGL.
Transport winds.....South winds 8-12 mph.

.SATURDAY...

Sky/weather.........Partly cloudy (50-60 percent cloud cover).
                    Chance of rain showers through the day. Slight
                    chance of thunderstorms in the afternoon.
CWR.................5 percent.
Chance of pcpn......30 percent.
Chance of lightning.23 percent.
Max temperature.....62-64.
Min humidity........51-53 percent.
Wind (20 ft)........East winds 2 to 4 mph becoming southeast late
                    in the morning, then becoming west 7 to 11 mph
                    in the afternoon. Gusty and erratic winds
                    expected near thunderstorms in the afternoon.
Mixing height.......6500 ft AGL (40-50th Percentile).
Transport winds.....South around 8 mph becoming southwest around 18
                    mph in the afternoon.

$$
Forecaster...Traphagan
Requested by...Becky Wildt
Type of request...WILDFIRE
.TAG 2622098.0/SLC
.DELDT 09/17/26
.FormatterVersion 2.0.0
.EMAIL utnuc@firenet.gov