441  
FXUS65 KSLC 261008  
AFDSLC  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE SALT LAKE CITY UT  
408 AM MDT WED JUN 26 2019  
   
SYNOPSIS
 
A LOW PRESSURE SYSTEM ALONG THE PACIFIC NORTHWEST  
COAST WILL MAINTAIN BREEZY AND WARM CONDITIONS ACROSS THE FORECAST  
AREA THROUGH THE UPCOMING WEEKEND.  
 

 
   
SHORT TERM (THROUGH 00Z SUNDAY)
 
A MILD SOUTHWESTERLY FLOW ALOFT  
PREVAILS ACROSS THE INTERIOR WEST EARLY THIS MORNING, DOWNSTREAM  
FROM AN UPPER LOW SPINNING ALONG THE PACIFIC NORTHWEST COAST. THIS  
GENERAL PATTERN WILL REMAIN IN PLACE THROUGHOUT THE SHORT TERM  
PERIOD WITH MAX TEMPERATURES RUNNING NEAR OR SLIGHTLY ABOVE CLIMO  
ACROSS THE FORECAST AREA. THE PRIMARY CONCERN OVER THE NEXT COUPLE  
OF DAYS WILL BE BREEZY TO WINDY CONDITIONS ACROSS THE WESTERN  
VALLEYS EACH AFTERNOON AS THIS FLOW MIXES DOWN.  
 
AS THE FLOW CONTINUES TO BACK A BIT TODAY, DRIER AIR ALOFT NOTED  
IN WATER VAPOR IMAGERY WILL ADVECT ACROSS THE FORECAST AREA. AS A  
RESULT ANY THREAT FOR CONVECTION SHOULD REMAIN MINIMAL ACROSS THE  
TERRAIN OF NORTHERN UTAH, AND ANY CONVECTION WHICH FIRES ACROSS  
NORTHEAST NEVADA SHOULD GENERALLY REMAIN WEST OF THE AREA EXCEPT  
PERHAPS THE EXTREME NORTHWEST CORNER.  
 
THE MODELS ARE SUGGESTING MOISTURE MAY BE ENTRAINED INTO THIS FLOW  
AND ADVECTED INTO THE AREA BY SATURDAY, PERHAPS BRINGING A BETTER  
CHANCE FOR CONVECTION. FOR NOW HAVE HELD OFF ON INTRODUCING ANY  
POPS FOR THIS TIME PERIOD, BUT IF MODELS MAINTAIN RUN TO RUN  
CONSISTENCY MAY SEE AN INCREASE IN CONVECTION BY THE WEEKEND FROM  
SOUTH TO NORTH.  
   
LONG TERM (AFTER 00Z SUNDAY)
 
UTAH AND SOUTHWEST WYOMING ARE  
EXPECTED TO MAINTAIN THE LONG TERM PERIOD UNDER SOUTHWEST FLOW  
ALOFT AHEAD OF A TROUGH OFF THE PACIFIC NORTHWEST COAST. THIS WILL  
MAINTAIN GENERALLY DRY CONDITIONS WITH MAXES RUNNING NEAR TO JUST  
ABOVE SEASONAL NORMALS.  
 
THERE REMAINS SOME DIVERGENCE AMONG THE GLOBAL MODELS WITH REGARD TO  
THE TRACK OF THE TROUGH. LATEST EC MOVES THIS SYSTEM NORTHWARD INTO  
CANADA, ALLOWING HIGH PRESSURE TO BUILD OVER THE FORECAST AREA AND  
KEEPING CONDITIONS DRY AND WARM THROUGH DAY SEVEN. IN THE GFS, THE  
SYSTEM MOVES ONSHORE, EVENTUALLY GRAZING NORTHERN UTAH ON MONDAY AND  
BRINGING A MOSTLY DRY COLD FRONT THROUGH. FOR NOW, HAVE GONE WITH A  
COMPROMISE BETWEEN THE MODEL SOLUTIONS AND KEPT TEMPERATURES NEAR  
CLIMO WITH LITTLE IN THE WAY OF MENTIONABLE POPS.  
 

 
   
AVIATION
 
THE SLC TERMINAL WILL SEE VFR CONDITIONS THROUGHOUT THE  
DAY WITH MOSTLY CLEAR SKIES. SOUTHERLY WINDS WILL CONTINUE TO  
INCREASE DURING THE DAY, BECOMING GUSTY BY THE AFTERNOON HOURS.  
 

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

 
 

 
 
SEAMAN/TRAPHAGAN  
 
FOR MORE INFORMATION FROM NOAA'S NATIONAL WEATHER SERVICE VISIT...  
HTTP://WEATHER.GOV/SALTLAKECITY  
 
FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION  
VISIT...  
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP  
 
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