367
FXUS65 KSLC 190419
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1019 PM MDT MON MAY 18 2026
KEY MESSAGES
- FREEZE CONDITIONS WILL IMPACT MANY UTAH VALLEYS TUESDAY MORNING
ACROSS CENTRAL AND SOUTHWEST UTAH AND PORTIONS OF NORTHERN UTAH.
MORE LOCALIZED FREEZE CONDITIONS WILL CONTINUE FOR WEDNESDAY
MORNING.
- TEMPERATURES WILL GRADUALLY WARM FOR THE REMAINDER OF THE WEEK,
REACHING VALUES UP TO 10F ABOVE SEASONAL NORMALS BY SATURDAY.
CONDITIONS WILL BE GENERALLY DRY, WITH THE EXCEPTION OF
NORTHEAST PORTIONS OF THE FORECAST AREA ON THURSDAY.
DISCUSSION
UTAH WILL REMAIN UNDER A CYCLONIC FLOW ALOFT WITH
HIGH PRESSURE OVER THE PACIFIC AND A MEAN TROUGH POSITIONED OVER
THE NORTH-CENRAL CONUS THROUGH LATE WEEK. GENERALLY WEAK IMPULSES
ARE EXPECTED TO RIPPLE THROUGH THE AREA DURING THIS TIME,
MAINTAINING ISOLATED TO WIDELY SCATTERED DIURNAL SHOWERS OVER
MAINLY THE HIGHER TERRAIN UNTIL A STRONGER TROUGH THURSDAY
BRINGS AN INCREASED CHANCE OF PRECIPITATION, FOCUSING MAINLY
ACROSS NORTHEAST UTAH AND SOUTHWEST WYOMING.
WHILE TEMPERATURES WILL GENERALLY SEE A GRADUAL WARMING TREND
ACROSS MOST AREAS THROUGH THE WEEK, THE AIRMASS WILL REMAIN COLD
ENOUGH THAT AS SKIES TREND CLEARER TONIGHT, EFFECTIVE RADIATIVE
COOLING WILL BRING FREEZING TEMPERATURES TO MANY VALLEYS ACROSS
CENTRAL AND SOUTHWEST UTAH AND LOCALLY ACROSS NORTHERN UTAH.
FREEZING CONDITIONS CAN BE EXPECTED AGAIN TUESDAY NIGHT/WEDNESDAY
MORNING, BUT LIKELY ACROSS A MORE LIMITED AREA.
MODELS ARE COMING INTO BETTER AGREEMENT WITH THE THURSDAY FEATURE,
AS IT BRINGS A COLD FRONT INTO UTAH BEGINNING LATE WEDNESDAY
NIGHT/THURSDAY MORNING THROUGH THURSDAY AFTERNOON. THE BEST
DYNAMICS AND ASSOCIATED PRECIPITATION WILL BE CONFINED TO AREAS
NORTH OF THE JET, COMPRISING AROUND THE NORTHEASTERN THIRD OF THE
FORECAST AREA. WITH A WARMER AIRMASS, SNOW LEVELS WILL NOT BE AS
LOW AS WITH THE PREVIOUS STORM, AND LOOKS TO BE IN THE 8-9KT
RANGE. AT THIS TIME, PRECIPITATION NOT EXPECTED TO BE PARTICULARLY
SIGNIFICANT, AS EVEN AT THE 75TH PERCENTILE, THE NBM REMAINS
UNDER 0.35 INCHES FOR QPF, AND UNDER 3 INCHES FOR SNOW (MAINLY IN
THE UINTAS).
ONE MORE WEAK TRAILING WAVE FOR FRIDAY MAY BRING A FEW MORE
ADDITIONAL WEAK SHOWERS, THEN HIGH PRESSURE LOOKS TO INCREASE
OVER THE AREA DURING THE WEEKEND INTO EARLY NEXT WEEK.
AVIATION...KSLC
VFR CONDITIONS WILL PERSIST FOR THE KSLC
TERMINAL THROUGH THE PERIOD. DRY CONDITIONS WITH CLEARING SKIES
WILL CONTINUE. LIGHT SOUTHERLY WINDS WILL DEVELOP OVERNIGHT BEFORE
TRANSITIONING TO A LIGHT NORTHERLY FLOW DURING THE DAY.
REST OF UTAH AND SOUTHWEST WYOMING
VFR CONDITIONS WILL PERSIST
FOR THE ENTIRE AIRSPACE THROUGH THE PERIOD. CONDITIONS WILL REMAIN
DRY WITH SKIES CLEARING OVERNIGHT. WINDS WILL BECOME LIGHT THIS
EVENING WITH AND EASTERLY/NORTHERLY COMPONENT PERSISTING FOR MOST
TERMINALS OVERNIGHT BEFORE BECOMING DIURNALLY DRIVEN DURING THE
DAY.
FIRE WEATHER
GENERALLY DRY CONDITIONS ARE EXPECTED TO PREVAIL
FOR THE REMAINDER OF THE WEEK. HOWEVER, THIS WILL BE BRIEFLY
INTERRUPTED ON THURSDAY AS A GRAZING TROUGH BRINGS GENERALLY LIGHT
PRECIPITATION TO NORTHEAST UTAH, WITH SOME LOCAL WETTING RAIN
POTENTIAL ACROSS THE NORTHERN MOUNTAINS. TEMPERATURES WILL
GRADUALLY WARM OVER THE NEXT SEVERAL DAYS, WITH HIGHS AVERAGING
10F ABOVE SEASONAL NORMALS BY THE UPCOMING WEEKEND.
SLC WATCHES/WARNINGS/ADVISORIES
UT...FREEZE WARNING FROM MIDNIGHT TONIGHT TO 9 AM MDT TUESDAY FOR
UTZ103-106>108-114>116-118>120-122.
WY...NONE.
CHENG/MAHAN
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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