Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 141628
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
928 AM MST SUN DEC 14 2014

.SYNOPSIS...A WEAKENING STORM SYSTEM WILL SLOWLY MOVE OUT OF THE
REGION TODAY. HIGH PRESSURE WILL RETURN FOR MONDAY WITH
ADDITIONAL WEAK SYSTEMS CROSSING THE AREA THROUGH MIDWEEK.

&&

.DISCUSSION...A COOL UPPER TROF REMAINS ACROSS THE FORECAST AREA
THIS MORNING. A SOUTHERN CENTER HAS CLOSED OFF AND IS HEADING EAST
INTO THE SRN PLAINS AND IS NO LONGER A FACTOR FOR OUR WEATHER.
ANOTHER CIRCULATION CENTER HAS FORMED NEAR THE UT/ID/NV TRIPLE
POINT AND IS ASSOCIATED WITH POOL OF COLD AIR ALOFT. THE AXIS OF
THIS CENTER IS ALIGNED NW-SE AND WILL GRADUALLY ROTATE
CYCLONICALLY THRU TODAY INTO TONIGHT BEFORE LIFTING N AHEAD OF A
RIDGE BUILDING IN FROM THE SW.

INSTABILITY ASSOCIATED WITH THIS CENTER HAS KEPT SNOW SHOWERS
GOING OVER NRN UT THRU THE MORNING. THE LAKE IS ENHANCING THESE
AND THE HEAVIEST SHOWERS HAVE BEEN TRAILING OFF DOWNWIND FROM THE
LAKE. EXPECT SNOW SHOWERS TO BECOME A LITTLE LESS FOCUSED BY THE
LAKE AND A LITTLE MORE WIDESPREAD THRU THIS AFTN NORTH OF THE
TROF AXIS WITH SOME MINOR ACCUMULATION. ONLY EXPECT ISOLATED
TRAVEL IMPACTS HOWEVER WITH MOST VALLEY ROADWAYS STAYING JUST WET.

STRATUS AND FOG THAT FORMED ACROSS THE SRN AND SWRN VALLEYS SHOULD
BURN OFF BY LATE MORNING. OTHERWISE MOSTLY CLEAR SKIES SHOULD
PREVAIL OUTSIDE OF THE AREAS AFFECTED BY THE UPPER TROF.

THE SNOW AND CLOUDS WILL RETREAT NWD WITH THE UPPER TROF AXIS THIS
EVE WITH A MOSTLY CLEAR COLD NIGHT EXPECTED. SOME LOCAL FOG COULD
DEVELOP IN THE NRN VALLEYS WHERE SNOW IS FALLING TODAY.

HIGH CLOUDS INCREASE FROM THE SW MON AND A WARM FRONT IS FORECAST
TO BRING A LITTLE SNOW MON NIGHT INTO TUE ACROSS THE EASTERN AND
NRN CWA.

THE NEXT UPPER TROF BEGINS TO SPREAD DEEPER MOISTURE INTO THE CWA
TUE AFN INCREASING TUE NIGHT. LIFT IS WEAK WITH THIS NEXT WAVE BUT
MOISTURE IS FORECAST TO BE ABUNDANT SO FAIRLY WIDESPREAD BUT
LIGHT PRECIP IS POSSIBLE.

UPDATED FORECASTS EARLIER TO ADD MENTION OF FOG FOR DIXIE THIS
MORNING AND ADJUST SKY COVER ACROSS THE SOUTH AND SOUTHEAST.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED TO PREVAIL AT THE SLC
TERMINAL THROUGH THE AFTERNOON...BUT PERIODIC LIGHT SNOW SHOWERS
WILL OCCASIONALLY DROP CONDITIONS INTO THE MVFR RANGE. THERE IS A 30
PERCENT CHANCE OF BRIEF IFR CONDITIONS DEVELOPING IN HEAVIER
SHOWERS. LIGHT NORTHWEST WINDS ARE EXPECTED DURING THE DAY.


&&

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

$$

PUBLIC...WILENSKY
AVIATION...TRAPHAGAN

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

FOR FREQUENTLY ASKED QUESTIONS ABOUT THE AREA FORECAST DISCUSSION
VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY/GENERAL/AFD_FAQS.PHP (ALL LOWER CASE)


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