905
FNUS75 KSLC 300112
FWSSLC

Spot Forecast for Heaps SAR...Zion National Park
National Weather Service Salt Lake City UT
712 PM MDT Mon Sep 29 2025

Forecast is based on forecast start time of 1900 MDT on September 29.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Dry conditions under mostly clear skies can be
expected tonight, with low temperatures around 50 degrees at the
SAR site. Clouds will begin to roll in early tomorrow morning
ahead of an approaching storm system. While this storm will eject
across northern Utah, a few showers and thunderstorms are still
possible across southern Utah tomorrow, with the most likely
timeframe for these to develop over/near the SAR area between
1100-1600. Brief moderate rain will be possible with the showers
and thunderstorms. Winds will remain relatively inside the canyon.
However, near the canyon rim, southerly winds will increase by
tomorrow morning ahead of the storm system. These winds are
expected to decrease and turn a bit more westerly by
midafternoon.


.REST OF TONIGHT...

Sky/weather.........Mostly clear (20-30 percent cloud cover).
Chance of pcpn......5 percent.
Chance of lightning.0 percent.
Min temperature.....49-52.
Max humidity........86-89 percent.
Surface winds (mph).Downslope/downcanyon winds 3-7 mph.
                    Near canyon rim, southeast winds 6-10 mph.

.TUESDAY...

Sky/weather.........Mostly cloudy (75-85 percent cloud cover) then
                    becoming partly cloudy (40-50 percent cloud
                    cover). Slight chance of showers and
                    thunderstorms after 1100.
Chance of pcpn......20 percent.
Chance of lightning.20 percent.
Max temperature.....78-81.
Min humidity........40-43 percent.
Surface winds (mph).Downslope/downcanyon winds 3-7 mph becoming
                    upslope/upcanyon 3-6 mph after 1300.
                    Near canyon rim, south-southwest winds
                    8-15 mph becoming west-southwest 6-11 mph
                    after 1500.

$$
Forecaster...Cheng
Requested by...See
Type of request...SAR
.TAG 2522741.0/SLC
.DELDT 09/29/25
.FormatterVersion 2.0.0
.EMAIL Zion_dispatch@nps.gov