Evanston, Wyoming 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

796
FXUS65 KSLC 121020
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
420 AM MDT Sat Jul 12 2025

.SYNOPSIS...A prolonged stretch of hot and dry conditions
continues into next week. Chances for isolated high-based showers
and thunderstorms return from Monday forward.

&&

.SHORT TERM (THROUGH 12Z MONDAY)...High pressure centered off the
SoCal coast today will maintain a mostly northwest flow aloft over
Utah today. The high center will largely remain in place tomorrow
while height rises spread into Utah. Expect temperatures to
gradually trend warmer through the weekend. Despite the dry airmass,
however, a few high-based showers may pop up over the higher
terrain, particularly the southern mountains and the high Uintas
each afternoon. These would remain very isolated but may be
accompanied by with brief, isolated, gusty outflow winds.

.LONG TERM (After 12Z/6AM Monday)...Ridging aloft gradually drifts
west by Monday with its western periphery hanging off the coast of
CA. With this flow pattern, modest moisture return will begin with
PWATs generally ranging from around 0.5-0.7" across the majority of
UT and southwest WY. This will be enough moisture to spark isolated
showers and thunderstorms across our typical higher terrain spots
each afternoon through the long term due to weak synoptic forcing in
play. With heights building over the forecast area, hot temperatures
are expected areawide throughout the duration of the long term with
our valley locations seeing temperatures in the upper 90s to low
100s each day. Additionally, lower Washington county will see
temperatures nearing and perhaps exceeding 110F each day. Be sure to
drink plenty of water, limit time in the sun, and dress
appropriately!

Nearing the end of the long term, troughing / a cutoff low looks to
develop off the west coast which will serve to increase moisture
return across the region. Guidance regarding this solution is
somewhat iffy at best and would support more widespread shower and
thunderstorm development beginning across southern UT as early as
Friday. This would be a welcomed solution as we have remained quite
dry as of late and bears watching as we head into the weekend.

&&

.AVIATION...KSLC...VFR conditions will persist at the KSLC terminal
through the TAF period. Typical diurnal wind shifts are expected to
northwesterly around 17z and southeasterlies once again around 04z.

.REST OF UTAH AND SOUTHWEST WYOMING...VFR conditions are expected to
persist through the TAF period. Generally diurnal winds will take
hold as overall flow remains light across UT and southwest WY.

&&

.FIRE WEATHER...High pressure building over the West Coast will
maintain dry conditions over Utah through the weekend with a gradual
warming trend. Afternoon relative humidities in the single digits
can be expected once again across the valleys of southern and
central Utah with poor overnight recoveries. Despite the dry
airmass, cumulus buildups and very isolated high-based showers will
be possible over the higher terrain of southern Utah as well as the
high Uintas this weekend, with a threat of brief, localized gusty
outflow winds. Additionally, portions of eastern Utah may see
marginal/isolated critical fire weather conditions this afternoon
and evening as the pressure gradient supports enhanced west to
northwest winds.

Modest midlevel moisture is expected to spread into the area
somewhat by Monday, bringing an increased threat of high-based
showers and thunderstorms. Coverage is expected to remain generally
isolated to widely scattered for much of the week, but the threat of
gusty outflow winds and dry lightning will exist. Deeper moisture
looks to work its way into the area by next weekend, increasing the
potential for wetting rain.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

$$

Cheng/Worster

For more information from NOAA`s National Weather Service visit...
http://weather.gov/saltlakecity