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.

&&

.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.

&&

.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. 

&&

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

&&

$$

SEAMAN

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)