FXUS65 KSLC 300404
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
904 PM MST SUN NOV 29 2009

.SYNOPSIS...HIGH PRESSURE WILL BUILD INTO THE AREA TONIGHT 
AND PERSIST THROUGH MONDAY NIGHT. A SYSTEM DROPPING THROUGH THE
PLAINS WILL SEND A DRY COLD FRONT ACROSS UTAH ON TUESDAY.

&&

.DISCUSSION...STRONG RIDGING CONTINUES TO BUILD INTO THE GREAT
BASIN FROM THE NORTHWEST THIS EVENING IN THE WAKE OF THE UPPER LOW
NOW CENTERED OVER NWRN MEXICO. THIS HAS BROUGHT CLEAR SKIES TO THE
CWA WITH A FEW WISPS OF CIRRUS DROPPING INTO THE NORTH.

SURFACE HIGH PRESSURE DOMINATES NRN UT WHILE THERE REMAINS
SUFFICIENT GRADIENT AND NELY FLOW ALOFT TO KEEP GUSTY WINDS
BLOWING THROUGH THE GAPS IN WASHINGTON CO. THE GRADIENT RELAXES
BY MON MORNING AND THE WINDS ALOFT VEER TO MORE ELY SHUTTING OFF
THE GAP WINDS.

STRONG WARMING ALOFT WILL PUT A LID ON THE NRN VALLEYS WITH
INVERSIONS BECOMING STRONG TONIGHT THROUGH MON NIGHT. THESE ARE
NOT EXPECTED TO LAST LONG ENOUGH FOR AIR QUALITY TO BECOME AN
ISSUE AS A SHORT WAVE DROPPING SOUTH EAST OF THE DIVIDE WILL SEND
A BACK DOOR COLD FRONT ACROSS THE CWA ON TUE. THIS FEATURE SHOULD
BE DRY WITH MAYBE SOME CLOUDINESS OVER WY AND THE NERN UT MTNS BUT
IT SHOULD BE COLD ENOUGH TO STIR THE VALLEYS AGAIN.

THE COOL NORTHERLY FLOW BEHIND THIS FEATURE REMAINS IN PLACE THRU
THU KEEPING THE AREA SOMEWHAT MIXED.

CURRENT FORECAST IN GOOD SHAPE AND NO UPDATES PLANNED AT THIS TIME.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED TO CONTINUE AT THE KSLC 
TERMINAL THROUGH THE TAF PERIOD. NORTHWEST WINDS ARE EXPECTED TO 
SWITCH TO THE SOUTHEAST BETWEEN 0500 UTC AND 0700 UTC.  THERE IS A 
20 PERCENT CHANCE THAT THE SWITCH TO SOUTHEAST WINDS WILL BE DELAYED 
UNTIL AFTER 0700 UTC.  

&&

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

&&

$$

WILENSKY/GRAHAM

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