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FXUS65 KSLC 230340
AFDSLC
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
840 PM MST SUN NOV 22 2009
.SYNOPSIS...A STORM SYSTEM WILL CONTINUE TO IMPACT THE AREA THROUGH
TONIGHT. HIGH PRESSURE ALOFT WILL THEN SETTLE OVER UTAH MONDAY
NIGHT...AND REMAIN OVER THE REGION THROUGH THE BALANCE OF THE WEEK.
&&
.DISCUSSION...A STORM SYSTEM CONTINUES TO MOVE ACROSS THE REGION
THIS EVENING. THE CLOSED UPPER LOW ASSOCIATED WITH THIS SYSTEM IS
CURRENTLY NOTED NEAR THE IDAHO/MONTANA BORDER WITH THE UPPER JET
DIVING ACROSS CENTRAL UTAH. THE ASSOCIATED COLD FRONT HAS MOVED TO
NEAR A MILFORD-PRICE-ROCK SPRINGS LINE AND WILL CONTINUE TO SWEEP
ACROSS SOUTHEAST UTAH THROUGH AROUND MIDNIGHT.
SNOWFALL DEVELOPED OVER NORTHERN UTAH/SOUTHWEST WYOMING THIS EVENING
AHEAD OF AND BEHIND THE FRONT...BUT THIS HAS ALREADY DECREASED IN
INTENSITY AS THE 700MB BAROCLINIC ZONE PUSHED SOUTH. DUE TO THE
POSITION OF THE JET...EXPECT PRECIPITATION TO REMAIN LIMITED TO
MAINLY THE NORTHERN HALF OF THE CWA. WITH PRECIPITATION WINDING DOWN
FOR THE MOST PART...EXPECT ONLY MINOR ADDITIONAL ACCUMULATIONS
THROUGH THE REMAINDER OF THE NIGHT BEFORE THE STORM SYSTEM MOVES
EAST OF THE AREA AND THE AIRMASS BECOMES MORE STABLE BY EARLY
TOMORROW MORNING. THE ONLY WILD CARD WILL BE THE LAKE. AT THIS
TIME...700MB TEMPERATURES OF -12C OVER LAKE TEMPERATURES OF +8C
SHOULD RESULT IN ENOUGH INSTABILITY FOR SOME LAKE-INDUCED SHOWERS TO
DEVELOP TONIGHT THROUGH AROUND 09Z...AND IT APPEARS THAT THESE
SHOWERS ARE ALREADY BEGINNING. LATEST BUFR SOUNDINGS INDICATE THESE
SHOWERS COULD IMPACT ANYWHERE FROM SOUTHERN DAVIS/NORTHEAST SALT
LAKE COUNTY TO THE CENTRAL SALT LAKE VALLEY...INCLUDING THE SALT
LAKE AIRPORT. WILL HAVE TO WATCH ITS DEVELOPMENT THIS EVENING TO SEE
IF ANY ADDITIONAL HEADLINES ARE NECESSARY. OTHERWISE...AM
CONSIDERING CANCELING THE ADVISORY FOR THE CACHE VALLEY LATER
TONIGHT...BUT KEEP THE MOUNTAIN ZONES GOING. AS FOR THE NORTHERN
WASATCH FRONT...WILL WAIT AND SEE IF THIS AREA WILL BE IMPACTED BY
THE LAKE-EFFECT.
HIGH PRESSURE WILL BUILD INTO THE AREA BEHIND THE DEPARTING LOW
TOMORROW AND THEN REMAIN IN PLACE THROUGH MUCH OF THE WEEK.
&&
.AVIATION...WINDS AT THE SLC TERMINAL ARE EXPECTED TO REMAIN
NORTHERLY THROUGH AROUND 12Z...BEFORE BECOMING SOUTHEASTERLY BETWEEN
11Z AND 15Z. HOWEVER...THERE IS A 30 PERCENT CHANCE THAT WINDS COULD
SHIFT TO THE SOUTHEAST AS EARLY AS 9Z. MVFR CONDITIONS ARE EXPECTED
TO SLOWLY IMPROVE TO VFR BETWEEN 6Z AND 9Z...BUT COULD LAST AS LONG
AS 12Z DEPENDING ON LAKE EFFECT SNOW. CEILINGS BELOW 6000 FEET ARE
EXPECTED THROUGH AROUND 15Z.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WINTER WEATHER ADVISORY UNTIL 4 AM MONDAY FOR UTZ007-UTZ009.
WINTER WEATHER ADVISORY UNTIL 4 AM MONDAY FOR UTZ001-UTZ002.
WY...NONE.
&&
$$
PUBLIC...CHENG
AVIATION...HOSENFELD
FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)
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