Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 221716
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1016 AM MST MON DEC 22 2014

.SYNOPSIS...A VERY MOIST AND STRONG NORTHWEST FLOW WILL CONTINUE
ACROSS NORTHERN AND CENTRAL UTAH TODAY. HIGH PRESSURE WILL BUILD
OVER THE FORECAST AREA TONIGHT THROUGH WEDNESDAY. ANOTHER STORM
SYSTEM WILL IMPACT THE AREA ON CHRISTMAS DAY.

&&

.DISCUSSION...MOIST NORTHWEST FLOW CONTINUING TO BRING COPIOUS
PRECIPITATION TO NORTHERN AND CENTRAL UTAH AS WELL AS STRONG GUSTY
WINDS TO THE HIGHER ELEVATIONS. ASSOCIATED FRONTAL BOUNDARY HAS
STALLED OVER CENTRAL UTAH BUT SHOULD PUSH SOUTHWARD THIS AFTERNOON
AS THE BACK EDGE OF THE TROUGH CONTINUES ACROSS THE FORECAST AREA.

PRECIPITATION IN ASSOCIATION WITH THE SYSTEM IS PROGGED TO
CONTINUE INTO THE AFTERNOON BEFORE TAPERING OFF EARLY THIS EVENING
AS THE SYSTEM EXITS. PRESSURE GRADIENT TIGHTENS A BIT OVER
PORTIONS OF THE AREA THIS AFTERNOON...WHICH WILL LIKELY CAUSE
WINDS TO SPIKE INTO THE ADVISORY RANGE FOR CASTLE COUNTRY AND
NORTHWEST UTAH. GOING ADVISORIES COVER THE THREAT WELL. WINDS
SHOULD START TO RELAX THIS EVENING AS THE GRADIENT WEAKENS AND
CORE OF THE STRONG JET MOVES OUT OF THE AREA.

HIGH PRESSURE IS PROGGED TO BUILD BACK INTO THE REGION TONIGHT AND
TOMORROW BEHIND THE EXITING SYSTEM...BUT WILL SHIFT EAST WEDNESDAY
AHEAD OF THE NEXT APPROACHING STORM SYSTEM. MODELS BECOMING
INCREASINGLY CONSISTENT IN MOVING THE NEXT STORM SYSTEM INTO THE
CWA EARLY CHRISTMAS DAY. WITH THE GLOBAL MODELS INDICATING A
STRONG FRONT AND AMPLE MOISTURE...SIGNIFICANT ACCUMULATIONS ARE
LOOKING MORE AND MORE LIKELY.

NO UPDATES EXPECTED TO THE FORECAST THIS MORNING.

&&

.AVIATION...SHOWERS ARE EXPECTED TO LINGER INTO THE EARLY AFTERNOON
...KEEPING CEILINGS AT THE SLC TERMINAL NEAR TO BELOW 6K AGL UNTIL
19-21Z. NORTHWEST WINDS SHOULD RAMP UP AFTER 19Z...BECOMING GUSTY
FROM 20-23Z. WINDS WILL DIMINISH AFTER THIS BUT REMAIN NORTH WELL
INTO THE LATE EVENING HOURS.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WINTER STORM WARNING UNTIL 6 PM MST THIS EVENING FOR UTZ007>010-
     517.

     WIND ADVISORY UNTIL 10 PM MST THIS EVENING FOR UTZ012.

     WIND ADVISORY UNTIL 8 PM MST THIS EVENING FOR UTZ005.

WY...NONE.
&&

$$

PUBLIC...TRAPHAGAN
AVIATION...VERZELLA

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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