928  
FXUS65 KSLC 252120  
AFDSLC  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
320 PM MDT FRI APR 25 2025  
   
SYNOPSIS
 
DRY, MILD AND GUSTY CONDITIONS EXPECTED ONCE  
AGAIN SATURDAY AHEAD OF AN APPROACHING SYSTEM. BROAD SYSTEM THEN  
PUSHES THROUGH SUNDAY AND MONDAY, BRINGING FAIRLY WIDESPREAD VALLEY  
RAINS AND LATE SEASON MOUNTAIN SNOWFALL. A SOMEWHAT UNSETTLED  
PATTERN THEN LOOKS TO CONTINUE INTO THE UPCOMING WEEK.  
 

 
   
SHORT TERM (THROUGH 12Z/6AM SUNDAY)
 
A BROAD TROUGH IS BEGINNING  
TO PUSH ONTO THE CALIFORNIA COAST THIS AFTERNOON. LOCALLY, WARMING  
H7 TEMPS IN THE INCREASING SOUTH TO SOUTHWESTERLY FLOW ARE RESULTING  
IN ANOTHER MILD DAY WITH TEMPS RUNNING WELL ABOVE NORMAL IN MOST  
PLACES. ADDITIONALLY, THIS ENHANCED FLOW IS RESULTING IN MIXING SOME  
STRONGER WIND GUSTS DOWN ACROSS PORTIONS OF SOUTHERN UTAH AS WELL AS  
THE WEST DESERT, WITH CURRENT GUSTS NOTED GENERALLY IN THE 35-45 MPH  
RANGE OR SO. ANTICIPATE THIS WILL MORE OR LESS PERSIST THROUGH THE  
DAY, WITH POTENTIAL FOR SOME BLOWING DUST IN AREAS DOWNSTREAM FROM  
AN ASSOCIATED DUST SOURCE.  
 
WHILE DRIER AIR IS WORKING INTO SOUTHERN UTAH TODAY AND LIMITING  
PRECIPITATION POTENTIAL, LINGERING MOISTURE IS NOTED ACROSS NORTHERN  
UTAH AND SOUTHWEST WYOMING. AHEAD OF THE AFOREMENTIONED TROUGH, A  
NOSE OF ENHANCED JET FLOW IS NOSING INTO THE REGION, WITH UPPER  
DIVERGENCE/DIFFLUENCE OVERHEAD, AND AN EMBEDDED MID-LEVEL IMPULSE  
PIVOTING INTO/THROUGH UTAH. IN COMBINATION WITH DIURNAL  
DESTABILIZATION, ESPECIALLY OVER THE HIGH NORTHERN TERRAIN,  
ANTICIPATE THE RESULT TO BE CONVECTIVE GROWTH THROUGH THE AFTERNOON.  
FURTHER, DEEP FLOW IS RESULTING IN ASSOCIATED DEEP LAYER AND  
EFFECTIVE SHEAR ON THE ORDER OF 40-50 KTS. SURFACE HIGH PRESSURE  
EXTENDING FROM WYOMING INTO THE NORTHERN PLAINS ALSO IS YIELDING A  
CONTINUED EASTERLY FOCUSED PRESSURE GRADIENT, AND ASSOCIATED  
EASTERLY LOW LEVEL FLOW IS LEADING TO SOME LOCALLY ENHANCED LOW  
LEVEL BACKING, RESULTING IN SOME MINOR TURNING TO ALREADY SOMEWHAT  
ELONGATED HODOGRAPHS. WITH THESE INGREDIENTS IN PLACE, ANY  
CONVECTION THAT BECOMES SUFFICIENTLY ORGANIZED MAY BE ABLE TO TAKE  
ADVANTAGE OF THE ENVIRONMENT, AND COULD SEE SOME AN ISOLATED STRONG  
TO SEVERE STORM WITH HAIL AND STRONG WIND GUSTS AS THE PRIMARY  
THREATS.  
 
DRY AIR WILL CONTINUE TO PUSH INTO THE AREA INTO THE NIGHT, WHICH  
WILL HELP RESULT IN A QUICK DOWNWARD TREND TO ANY LINGERING  
CONVECTION AS DIURNAL HEATING CEASES. WEATHER OVERNIGHT ULTIMATELY  
LOOKS QUIETER, WITH TEMPERATURES NEAR TO SLIGHTLY ABOVE NORMAL  
ACROSS SOUTHERN UTAH, AND AROUND 5-10 DEGREES ABOVE NORMAL ELSEWHERE.  
 
SATURDAY INTO SATURDAY NIGHT THE BROAD TROUGH WILL CONTINUE SLOWLY  
CHURNING TOWARDS AND EVENTUALLY INTO THE GREAT BASIN. INITIALLY  
THOUGH THE DAY SATURDAY, MOISTURE REMAINS LIMITED ENOUGH TO LARGELY  
SUBDUE PRECIPITATION CHANCES. STRONG DEEP LAYER SOUTHERLIES WILL  
OTHERWISE PROMOTE ANOTHER SIMILARLY GUSTY DAY ACROSS SOUTHERN UTAH  
AND THE WEST DESERT REGION, WITH MORE MODEST WIND GUSTS IN THE 20-30  
MPH RANGE ELSEWHERE AT AREAS FURTHER NORTH. TEMPERATURES WILL ONCE  
AGAIN BE QUITE MILD, WITH HIGHS IN THE 70S AT MOST LOWER ELEVATION  
VALLEYS THROUGHOUT UTAH, AND IN THE 60S ACROSS SOUTHWEST WYOMING.  
MOVING INTO THE MORNING HOURS CLOSER TO SUNRISE SUNDAY, WILL SEE  
MOISTURE START TO INCREASE AS THE TROUGH NEARS, AND WILL SEE LOW END  
SHOWER CHANCES START TO CREEP IN.  
   
LONG TERM (AFTER 12Z SUNDAY/6AM SUNDAY)
 
A PERIOD OF UNSETTLED  
WEATHER CAN BE EXPECTED THROUGH MUCH OF THE LONG TERM FORECAST  
PERIOD, AS A SERIES OF WEATHER DISTURBANCES ROTATE INTO THE AREA.  
THIS WILL BRING PERIODS OF VALLEY RAIN AND MOUNTAIN SNOW THROUGH  
THE WEEK, ALONG WITH COOLER TEMPERATURES FOR THE BEGINNING OF THE  
WEEK.  
 
SUNDAY MORNING, AN UPPER LOW CONTINUES TO APPROACH UTAH FROM THE  
WSW. THIS WILL PUSH A COLD FRONT INTO THE STATE, BEGINNING ACROSS  
SOUTHWEST UTAH LATE SATURDAY NIGHT, PROGRESSING EAST THROUGH  
THE REST UTAH THROUGH SUNDAY AFTERNOON. PRECIPITATION IS EXPECTED TO  
DEVELOP ALONG AND BEHIND THE FRONTAL BOUNDARY. WITH H7 TEMPERATURES  
FALLING TO AROUND -6C, EXPECT SNOW LEVELS AS LOW AS 5.5-6KFT. A  
SECOND SHORTWAVE DISTURBANCE COMING FROM THE NORTHWEST IS THEN  
FORECAST TO ELONGATE AND SHEAR APART ALONG THE BACK SIDE OF THE  
CLOSED LOW. HOWEVER, THIS IS ENOUGH TO BRING A SECONDARY COLD PUSH  
FROM THE NORTHWEST INTO UTAH ON MONDAY, ALONG WITH ANOTHER ROUND OF  
PRECIPITATION. MODELS ARE IN RELATIVELY GOOD AGREEMENT WITH RESPECT  
TO THE LARGE-SCALE EVOLUTION SUNDAY THROUGH MONDAY. LOCALLY  
SIGNIFICANT MOUNTAIN SNOWFALL WILL BE POSSIBLE, WITH THE NBM 25TH-  
75TH PERCENTILE OF SNOW ACCUMULATION IN THE 3-10 INCH RANGE IN  
THE UPPER COTTONWOODS. OTHERWISE, MOST OTHER MOUNTAINS HAVE 1 TO  
AROUND 4 OR 6 INCHES AS THE 25TH-75TH PERCENTILE IN THE NBM. SOME  
HIGHER VALLEYS, ESPECIALLY ACROSS SOUTHERN UTAH, COULD ALSO SEE SOME  
LIGHT SNOW, WITH AROUND A 50% CHANCE OF 0.1 INCHES OF SNOW OR  
GREATER IN THE CEDAR CITY AREA THE UPPER SEVIER VALLEYS.  
 
A WEAK SHORTWAVE RIDGE LOOKS TO SHIFT OVER THE AREA ON TUESDAY  
BEFORE ANOTHER TROUGH MOVES INTO THE AREA ON WEDNESDAY. SOME MODELS  
HAVE THIS TROUGH PINCHING OFF INTO A WEAK CLOSED LOW WHICH THEN  
MEANDERS INTO THE GREAT BASIN OR DESERT SOUTHWEST AREA THROUGH LATE  
WEEK. WHILE THERE IS A BIT MORE UNCERTAINTY REGARDING THE EVOLUTION  
OF THIS NEXT SYSTEM, THERE REMAINS A CHANCE FOR PRECIPITATION.  
HOWEVER, THE GENERAL CONSENSUS IS THAT THE AIRMASS WILL AT LEAST BE  
WARMER, LIKELY ABOVE CLIMATOLOGICAL NORMALS.  
 

 
   
AVIATION...KSLC
 
HIGH-BASED SHOWERS HAVE DEVELOPED EAST OF THE  
TERMINAL THIS AFTERNOON, AND WILL CONTINUE TO DEVELOP ALONG THE  
HIGHER TERRAIN OF THE WASATCH BEFORE MOVING NORTHEAST THROUGH THE  
EVENING. SHOWERS ARE UNLIKELY TO IMPACT THE TERMINAL, THOUGH GUSTY  
AND ERRATIC OUTFLOW WINDS ARE POSSIBLE THOUGH AROUND 02Z SATURDAY.  
WINDS WILL REMAIN GUSTY OUT OF THE SOUTH THROUGH THIS AFTERNOON,  
BECOMING LIGHTER OVERNIGHT. AN INCOMING WEATHER SYSTEM WILL BRING  
ABOUT GUSTY SOUTHERLY WINDS BY LATE MORNING SATURDAY THROUGH THE  
AFTERNOON.  
   
REST OF UTAH AND SOUTHWEST WYOMING
 
SCATTERED SHOWERS WILL  
CONTINUE THIS AFTERNOON MAINLY NORTH AND EAST OF THE WASATCH CREST  
AND INTO SOUTHWEST WYOMING. ISOLATED THUNDERSTORMS ARE POSSIBLE  
THROUGH AROUND 02Z SATURDAY, WITH A 30% CHANCE FOR STORMS TO IMPACT  
KLGU-KEVW. ANY STORMS THAT DEVELOP WILL BE CAPABLE OF DETERIORATED  
VISIBILITY UNDER BRIEF HEAVY RAINFALL, AS WELL AS GUSTY AND ERRATIC  
OUTFLOW WINDS. OTHERWISE, DRIER CONDITIONS BUILD INTO THE REGION  
OVERNIGHT INTO SATURDAY, WITH SOUTHWESTERLY WINDS INCREASING  
AREAWIDE THROUGH SATURDAY AFTERNOON.  
 

 
   
SLC WATCHES/WARNINGS/ADVISORIES
 
 
UT...NONE.  
WY...NONE.  

 
 

 
 
SHORT TERM...WARTHEN  
LONG TERM...CHENG  
AVIATION...WHITLAM  
 
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...  
HTTP://WEATHER.GOV/SALTLAKECITY  
 
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