FXUS65 KSLC 041148
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
448 AM MST FRI DEC 4 2009

.SYNOPSIS...A COLD TROUGH WILL MOVE SOUTH INTO THE AREA SATURDAY
AND REMAIN INTO SUNDAY. ANOTHER COLD TROUGH WILL CROSS THE GREAT
BASIN SUNDAY NIGHT THROUGH TUESDAY. THIS UNSETTLED PATTERN WILL
CONTINUE THROUGH MUCH OF NEXT WEEK.

&&

.DISCUSSION...SHORT WAVE RIDGING IS SPREADING SEWD INTO THE
FORECAST AREA THIS MORNING AS THE LARGE COLD TROF OVER THE
CENTRAL US SHIFTS EAST. THIS WILL BRING SOME WARMING TO THE CWA
TODAY BUT MOSTLY TO THE MTNS AND THE SWRN VALLEYS. 

THE NEXT COLD TROF TO IMPACT THE CWA IS DROPPING S OUT OF BRITISH
COLUMBIA THIS MORNING AND WILL SEND A COLD FRONT INTO NRN UT EARLY
SAT. THE MODELS HAVE VARIOUS DEPICTIONS OF PRECIP WITH THE FRONT
BUT OVERALL IT IS NOT EXPECTED TO PRODUCE MUCH UNTIL IT MOVES PAST
NRN UT...AND EVEN THEN SHOULD BE ONLY A MODEST PRODUCER AT BEST. 

THE 06Z GFS AND THE 00Z EC HAVE FINALLY COME INTO PRETTY CLOSE
AGREEMENT ON THE SUBSEQUENT EVOLUTION OF THIS SYSTEM AFTER SAT
WITH THE NEXT WAVE SPREADING PRECIP BACK INTO THE AREA SUN NIGHT
THEN CONTINUING INTO TUE. BOTH ALSO SHOW THE BULK OF THE PRECIP
ACROSS CENTRAL AND SRN UT. 

THIS SYSTEM FINALLY MOVES OUT TUE AFTN BUT ANOTHER WARMER WAVE IS
FORECAST TO MOVE INTO THE WEST LATE WED WITH ADDITIONAL WAVES THRU
THE END OF THE WEEK. 

&&

.AVIATION...WINDS AT THE SLC TERMINAL WILL BE SOUTHERLY THROUGH THE 
DAY.  WINDS ARE EXPECTED TO BECOME MORE SOUTHWESTERLY BETWEEN 21Z 
AND 00Z...WITH A 10 PERCENT CHANCE THAT THEY WILL BECOME 
NORTHWESTERLY AT TIMES DURING THAT SAME PERIOD. VFR CONDITIONS WITH 
CEILINGS ABOVE 7000 FEET WILL PREVAIL.  

&&

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

&&

$$

WILENSKY/HOSENFELD

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