AREA FORECAST DISCUSSION

 
 FXUS65 KSLC 251133
 AFDSLC
 
 AREA FORECAST DISCUSSION
 NATIONAL WEATHER SERVICE SALT LAKE CITY UT
 430 AM MST WED NOV 25 2009
 
 .SYNOPSIS...HIGH PRESSURE ALOFT WILL STRENGTHEN AND REMAIN ACROSS
 THE REGION THROUGH THE LATTER HALF OF THE WEEK. A PACIFIC STORM
 SYSTEM IS EXPECTED TO MOVE INTO THE GREAT BASIN LATE FRIDAY AND
 SATURDAY.
 
 
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 .DISCUSSION...EARLY MORNING WATER VAPOR IMAGERY AND OBJECTIVE 
 ANALYSIS SHOW A BROAD MID LEVEL RIDGE ENCOMPASSING MUCH OF THE 
 WESTERN CONUS...WITH ASSOCIATED SURFACE HIGH REMAINING CENTERED 
 ACROSS SOUTHERN ID AND NORTHERN UT. THIS RIDGE WILL GRADUALLY 
 MIGRATE EASTWARD THROUGH THANKSGIVING DAY...ALLOWING FOR CONTINUED 
 WARMING ALOFT WHICH WILL ACT TO FURTHER STRENGTHEN VALLEY INVERSIONS 
 ACROSS THE AREA...BUT ALLOW FOR A WARMING TREND ACROSS THE HIGHER 
 ELEVATIONS. 
 
 MEDIUM RANGE MODELS CONTINUE TO ADVERTISE A PACIFIC TROUGH TO MOVE 
 INTO THE WESTERN CONUS OVER THE WEEKEND...WITH SOME DIFFERENCES 
 BETWEEN THE VARIOUS MODELS WITH RESPECT TO TIMING AND EVOLUTIONARY 
 DETAILS.  MODELS ARE IN FAIR AGREEMENT PUSHING SURFACE COLD FRONT 
 THROUGH THE FORECAST AREA FRIDAY AFTERNOON/EVENING WITH SPLITTING 
 LEAD SHORTWAVE TROUGH. WEAK DYNAMICS AND LIMITED MOISTURE WILL 
 RESULT IN ONLY A SMALL THREAT FOR SNOWFALL AS THIS FEATURE PASSES 
 THROUGH THE AREA. SECONDARY SHORTWAVE EXPECTED TO DROP THROUGH THE 
 REGION LATE SATURDAY/EARLY SUNDAY...WITH MOISTURE AGAIN LACKING. AS 
 A RESULT HAVE GENERALLY MAINTAINED SLIGHT CHANCE/LOW CHANCE POPS 
 THROUGH THIS PERIOD.
 
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 .AVIATION...VFR CONDITIONS WILL CONTINUE AT THE SLC TERMINAL THROUGH 
 THE PERIOD. LIGHT AND VARIABLE WINDS OR SOUTHEAST DRAINAGE UNTIL 
 NORTHWEST LAKE BREEZE RESUMES BETWEEN 18Z AND 19Z. 
 
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 .SLC WATCHES/WARNINGS/ADVISORIES...
 UT...NONE.
 WY...NONE.
 
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 $$
 
 SEAMAN
 
 FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
 HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)