683
FXUS65 KSLC 131000
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
400 AM MDT SAT SEP 13 2025
SYNOPSIS
A SLOW MOVING STORM SYSTEM WILL EXIT THE AREA THIS
EVENING. HIGH PRESSURE WILL BRIEFLY RETURN FOR SUNDAY BEFORE A
GRAZING STORM SYSTEM BRINGS COOLER TEMPERATURES AND SOME
PRECIPITATION TO NORTHERN UTAH MONDAY INTO EARLY TUESDAY. DRIER
CONDITIONS WILL RETURN THEREAFTER.
SHORT TERM (THROUGH 12Z MONDAY)
A SLOW MOVING PACIFIC STORM
SYSTEM IS CONTINUING TO TRACK ACROSS UTAH AND SOUTHWEST WYOMING
THIS MORNING. CURRENTLY JUST SEEING SOME SCATTERED CLOUDS ACROSS
THE FORECAST AREA. HOWEVER, WILL SEE SOME CONVECTION START TO
REDEVELOP, PRIMARILY OVER EASTERN UTAH, AS EARLY AS THE LATE
MORNING, WITH SCATTERED CONVECTION PERSISTING INTO THE AFTERNOON
HOURS. TEMPERATURES WILL RUN NEAR NORMAL FOR THIS TIME OF YEAR.
AS THE SYSTEM EXITS, HIGH PRESSURE WILL MOVE OVER THE AREA FOR
LATE SATURDAY INTO SUNDAY. THIS WILL RESULT IN DRY CONDITIONS FOR
THE LATTER HALF OF THE WEEKEND AS TEMPERATURES STAY RIGHT AROUND
CLIMO.
LONG TERM (AFTER 12Z MONDAY)
A QUINTESSENTIAL FALL PATTERN
WILL SET UP DURING THE LONG TERM PERIOD. A WEAKENING SHORTWAVE
TROUGH WILL GRAZE NORTHERN UTAH MONDAY AND TUESDAY BRINGING A SLIGHT
CHANCE FOR PRECIPITATION ALONG WITH A COOLER AIRMASS. MOISTURE WILL
BE LIMITED WITH THIS WEAKLY FORCED WAVE. ONLY ~30% OF ENSEMBLE
MEMBERS HAVE PRECIPITATION, WHICH IS CONFINED TO THE FAR NORTHERN
AND EASTERN PORTION OF THE CWA. TEMPERATURES WILL BE RUNNING JUST A
FEW DEGREES BELOW NORMAL ON MONDAY AND TUESDAY ACROSS THE NORTH
THANKS TO THIS FRONTAL PASSAGE. THIS AIRMASS DOESN'T PUSH INTO
CENTRAL AND SOUTHERN UTAH WHICH WILL KEEP TEMPERATURES NEAR TO
SLIGHTLY ABOVE NORMAL.
A RIDGE STARTS TO BUILD INTO THE GREAT BASIN REGION BY MIDWEEK. THIS
WILL RESULT IN A WARMING TREND WITH TEMPERATURES NEAR TO SLIGHTLY
ABOVE NORMAL. SOUTHERLY FLOW WILL MAKE A RETURN TOWARDS THE END OF
THE WEEK WHICH WILL ADVECT MOISTURE UP INTO THE AREA. DIURNAL
CONVECTION WILL BE POSSIBLE FRIDAY AND SATURDAY, BUT AN APPROACHING
TROUGH INTO THE PNW COULD BRING SOME ENHANCED LIFT TO THE AREA AS
THE POTENTIAL FOR SOME EJECTING SHORTWAVES OUT AHEAD OF THE TROUGH
COULD BRING SOME ENHANCED LIFT ALLOWING FOR BETTER COVERAGE IN
CONVECTION. ROUGHLY 50% OF ENSEMBLE MEMBERS HAVE ENOUGH MOISTURE TO
RESULT IN MEASURABLE QPF, WHILE THE REMAINING 50% KEEP CONDITIONS ON
THE DRIER SIDE.
AVIATION...KSLC
VFR CONDITIONS WILL PERSIST FOR THE KSLC TERMINAL
THROUGH THE PERIOD. MOSTLY DRY CONDITIONS WITH SOME MID LEVEL CLOUDS
AND LIGHT DIURNALLY DRIVEN WINDS WILL CONTINUE. THERE IS ~20% CHANCE
OF AN ISOLATED AFTERNOON THUNDERSTORM.
REST OF UTAH AND SOUTHWEST WYOMING
VFR CONDITIONS WILL PERSIST
FOR THE ENTIRE AIRSPACE THROUGH THE PERIOD. MOSTLY DRY CONDITIONS
AND SOME MID LEVEL CLOUDS WITH LIGHT DIURNALLY DRIVEN WINDS WILL
CONTINUE. SOME ISOLATED DIURNAL CONVECTION WILL PRIMARILY BE FOCUSED
ACROSS THE FAR EASTERN AIRSPACE LIKELY NOT IMPACTING ANY
TERMINALS.
FIRE WEATHER
A SLOW MOVING STORM SYSTEM WILL CONTINUE TO MAKE ITS
WAY ACROSS THE AREA TODAY BEFORE EXITING TONIGHT. THIS WILL BRING
CONTINUED UNSETTLED CONDITIONS, PARTICULARLY FOR THE EASTERN HALF
OF UTAH. HIGH PRESSURE WILL BRIEFLY MOVE IN BEHIND THE SYSTEM FOR
SUNDAY, BRINGING MOSTLY DRY CONDITIONS WITH HIGHS NEAR SEASONAL
NORMALS. A GRAZING STORM SYSTEM WILL BRING A FEW SHOWERS TO
NORTHERN UTAH MONDAY INTO EARLY TUESDAY, ALONG WITH SOME SLIGHT
COOLING. DRIER CONDITIONS ARE EXPECTED TO RETURN THEREAFTER.
SLC WATCHES/WARNINGS/ADVISORIES
UT...NONE.
WY...NONE.
SHORT TERM/FIRE WEATHER...TRAPHAGAN
LONG TERM/AVIATION...MAHAN
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY
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