179
FXUS65 KSLC 192151
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
351 PM MDT SAT APR 19 2025
SYNOPSIS
UTAH AND SOUTHWEST WYOMING WILL SEE MOSTLY DRY
CONDITIONS AND A GENERAL WARMING TREND OVER THE NEXT SEVERAL DAYS.
A SERIES OF WEAK STORM SYSTEMS GRAZING NORTHERN UTAH TONIGHT,
MONDAY, AND WEDNESDAY WILL BRING SOME INCREASED CLOUDS AND MAY
TEMPORARILY CURB THE WARMING TREND.
SHORT TERM (THROUGH 12Z/6AM MONDAY)
SHORTWAVE RIDGING HAS MOVED
OVER UTAH AND SOUTHWEST WYOMING THIS AFTERNOON IN THE WAKE OF THE
EXITING TROUGH. TEMPERATURES HAVE WARMED NOTICEABLY COMPARED TO
YESTERDAY BUT REMAIN ON THE COOL SIDE, AVERAGING 5F BELOW SEASONAL
NORMALS UNDER CLEAR SKIES.
CLOUDS ARE EXPECTED TO INCREASE OVER NORTHERN UTAH TONIGHT INTO
TOMORROW MORNING AS A VERY WEAK SHORTWAVE GRAZES THE AREA.
ANTICIPATING LITTLE IF ANY PRECIPITATION WITH THIS PASSAGE, BUT IT
WOULD BRING A LOW CHANCE OF SHOWERS TO AREAS NEAR THE UTAH/IDAHO
BORDER OVERNIGHT. SHORTWAVE RIDGING LOOKS TO BE ON TRACK TO RETURN
BY THE AFTERNOON, HOWEVER, AS CLOUDS DIMINISH, ALLOWING FOR MAXES
AVERAGING AROUND 5F ABOVE SEASONAL NORMALS.
LONG TERM (AFTER 12Z/6AM MONDAY)
A WEAK BAROCLINIC ZONE WILL
BRING SHOWERS THROUGH EARLY MONDAY FOR SOUTHWEST WYOMING AND
NORTHERN UTAH. MOST OF THE SHOWERS WILL BE LIGHT AND SCATTERED,
PRIMARILY FOR THE NORTHERN MOUNTAINS. THE ASSOCIATED TROUGH WILL
STAY TO THE NORTH AND TRACK EAST THROUGH MONDAY, SO THE COLD FRONT
WILL LIFT THROUGH THE AFTERNOON. SHOWERS WILL TAPER OFF AS THE COLD
FRONT LIFTS. SNOW ACCUMULATION OF 1-3 INCHES IS LIKELY FOR MUCH OF
THE NORTHERN MOUNTAINS.
ZONAL FLOW WILL LAST THROUGH TUESDAY WITH DRY CONDITIONS.
TEMPERATURES WILL WARM THROUGHOUT SOUTHWEST WYOMING AND UTAH, WITH
VALLEY HIGHS FROM THE UPPER 60S TO MID 70S.
A SHORTWAVE TROUGH WILL SLIDE INTO NORTHERN UTAH WEDNESDAY, BRINGING
SCATTERED SHOWERS TO SOUTHWEST WYOMING AND NORTHERN UTAH. WEST TO
SOUTHWEST FLOW WILL BRING WARMER CONDITIONS AND SNOW LEVELS AROUND
8000 FEET. THE SHORTWAVE WILL NOT BRING MUCH PRECIPITATION, WITH
MOUNTAIN SNOW ACCUMULATIONS AROUND AN INCH OR LESS.
THERE IS GOOD AGREEMENT THAT A LONGWAVE TROUGH WILL SLIDE INTO THE
EASTERN PACIFIC THURSDAY, WHICH WILL ENHANCE SOUTHWEST FLOW. WITHIN
THAT, THERE WILL BE SHORTWAVE ENERGY AND UPPER DIFFLUENCE FOR
SHOWERS FOR SOUTHWEST WYOMING AND NORTHERN UTAH. MOST SHOWERS WILL
BE IN THE NORTHERN MOUNTAINS, WITH SNOW LEVELS AROUND 9000 FEET AND
LIGHT ACCUMULATIONS. SOUTHWEST WINDS THROUGHOUT SOUTHERN UTAH WILL
GUST IN EXCESS OF 30 MPH. TEMPERATURES WILL CLIMB INTO THE 70S AND
80S FOR VALLEYS, ALMOST 15F WARMER THAN NORMAL.
THERE ARE A RANGE OF SCENARIOS FOR HOW THE LONGWAVE TROUGH WILL
TRACK INLAND, BUT IT IS LIKELY THAT SOUTHWEST WINDS WILL ENHANCE
FURTHER NORTHWARD FRIDAY. GUSTS WILL LIKELY EXCEED 35 MPH IN
SOUTHERN UTAH AND 30 MPH IN SOUTHWEST WYOMING AND NORTHERN UTAH,
WITH SCATTERED SHOWERS, PRIMARILY FOR THE NORTHERN MOUNTAINS.
AVIATION...KSLC
VFR CONDITIONS WITH TYPICAL LIGHT, DIURNAL WIND
SHIFTS EXPECTED. NORTHWEST WINDS WILL BECOME SOUTHEAST AGAIN AFTER
AROUND 03Z THIS EVENING, THEN BACK TO THE NORTHWEST AGAIN AROUND 18Z
ON SUNDAY.
REST OF UTAH AND SOUTHWEST WYOMING
VFR CONDITIONS WILL PREVAIL
ACROSS THE AREA THROUGH THE TAF PERIOD. GENERALLY NORTHERLY WINDS
THIS AFTERNOON WILL RELAX AND BECOME LIGHT AND TERRAIN DRIVEN
THROUGH THE DAY ON SUNDAY.
SLC WATCHES/WARNINGS/ADVISORIES
UT...NONE.
WY...NONE.
SHORT TERM...TRAPHAGAN
LONG TERM...WILSON
AVIATION...CHURCH
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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