189
FNUS75 KSLC 210311
FWSSLC

Spot Forecast for GLCA NRCREW3...NPS GLCA
National Weather Service Salt Lake City UT
911 PM MDT Thu Aug 20 2026

Forecast is based on forecast start time of 2200 MDT on August 20.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Scattered showers and thunderstorms continue this
evening over southern Utah. Current showers to the north and south
of the lake are tracking due west and should bring little to no
precipitation over the next hour or two. There will be additional
development overnight with a medium (30-40 percent) chance of
storms moving over Lake Powell, most likely between about midnight
and 3am. Storms are expected to diminish as sunrise approaches,
with additional showers and thunderstorms starting tomorrow
afternoon as additional monsoon moisture moves in. Winds will be
generally light away from thunderstorms.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy (45-55 percent cloud cover). Chance
                    of showers and thunderstorms.
Chance of pcpn......30 percent.
Chance of lightning.10 percent.
Min temperature.....72-76.
Surface winds (kts).Southwest winds 5-10 knots. Gusty and erratic winds
                    near any thunderstorms.

$$
Forecaster...Traphagan
Requested by...Gamble
Type of request...MARINE
.TAG 2620149.0/SLC
.DELDT 08/20/26
.FormatterVersion 2.0.0
.EMAIL glca_dipatch_Center@nps.gov