Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 240454
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
954 PM MST SUN NOV 23 2014

.SYNOPSIS...A WEAK SYSTEM WILL CROSS NORTHERN UTAH TONIGHT AND
MONDAY. ANOTHER WEAK SYSTEM WILL CROSS THE NORTH TUESDAY AND
TUESDAY NIGHT. HIGH PRESSURE WILL BUILD INTO THE REGION FOR
MIDWEEK.

&&

.DISCUSSION...HIGH PRESSURE IS AMPLIFYING OFF THE WEST COAST AND A
DEEP TROF COVERS THE CENTRAL US. STRONG NWLY FLOW BETWEEN THESE
FEATURES IS OVER OUR CWA WITH AN EMBEDDED SHORT WAVE TROF DROPPING
OUT OF ID AND INTO NRN UT.

THIS TROF WILL GENERATE ENOUGH LIFT TO PRODUCE AREAS OF SNOW
ACROSS THE NRN CWA TONIGHT INTO MONDAY. THE AIRMASS IS COLD ENOUGH
FOR SNOW TO ALL VALLEY FLOORS AND EXPECT SUFFICIENT ACCUMULATION
ON ROADS IN THE CACHE VALLEY TO IMPACT TRAVEL THROUGH THE MORNING
COMMUTE.

THE REST OF THE WASATCH FRONT VALLEYS WILL ALSO SEE SNOW BUT
SLIGHTLY WARMER SURFACE TEMPS SHOULD PRECLUDE MUCH ROADWAY
ACCUMULATION. LOCAL BRIEF SLUSHY CONDITIONS COULD OCCUR IN PERIODS
OF HEAVIER SNOW BUT IT SHOULD NOT HAVE AS MUCH IMPACT ON TRAVEL.
STILL...THERE IS SOME POTENTIAL FOR IMPACT ON THE MORNING COMMUTE
IN THESE AREAS AS WELL.

ROADWAYS THROUGH THE WASATCH MTNS...MT VALLEYS AND WY ZONES WILL
BE MORE LIKELY TO HAVE SNOW ACCUMULATION AND EXPECT TRAVEL
IMPACTS TO BE A BIT MORE WIDESPREAD IN THESE AREAS. GUSTY WINDS
WILL ALSO CREATE DRIFTING SNOW AND LOWER VISIBILITIES IN THE MTNS
AND ACROSS WY ADDING TO THE IMPACT. EXISTING WINTER WEATHER
HIGHLIGHTS LOOK ON TRACK AND PLAN NO CHANGES.

THE SNOW SHOULD TAPER OFF FAIRLY RAPIDLY BY MIDDAY MONDAY AS THE
UPSTREAM RIDGE EXPANDS EWD AND SUBSIDENCE BEGINS. MOISTURE
STREAMING OVER THE RIDGE ARRIVES IN NRN UT TUE AND THE WARM
ADVECTION NW FLOW SHOULD WRING OUT SOME PRECIP. THE WARMING
AIRMASS SHOULD RESULT IN RAIN...OR SNOW RAPIDLY CHANGING TO RAIN
IN THE VALLEYS.

NO UPDATES PLANNED AT THIS TIME.

&&

.AVIATION...CEILINGS BELOW 7000FT WILL PREVAIL AT THE SLC
TERMINAL THROUGH MONDAY MORNING. PERIODS OF IFR VIS IN SNOW ARE
EXPECTED STARTING AROUND 08Z-10Z ENDING AROUND 16Z MONDAY.
SOUTHEASTERLY WINDS SHOULD CONTINUE UNTIL ABOUT 11-13Z THEN
SWITCH TO NORTHERLY.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WINTER WEATHER ADVISORY UNTIL 5 PM MST MONDAY FOR UTZ006-010.

     WINTER STORM WARNING UNTIL 5 PM MST MONDAY FOR UTZ007>009.

     WINTER WEATHER ADVISORY UNTIL 11 AM MST MONDAY FOR UTZ001.

WY...WINTER WEATHER ADVISORY UNTIL 3 PM MST MONDAY FOR WYZ021.

&&

$$

WILENSKY

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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