Weather Service Report


741 
FXUS65 KSLC 230425
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
925 PM MST SAT NOV 22 2014

.SYNOPSIS...COLD UNSETTLED WEATHER WILL LINGER THROUGH MONDAY.
HIGH PRESSURE WILL BUILD FOR MIDWEEK.

&&

.DISCUSSION...THE FRONTAL BAND CROSSED THE NRN CWA LATE AFTN THRU
EARLY EVE WITH PRECIP CHANGING OVER TO SNOW IN MOST AREAS JUST
BEFORE IT ENDED BUT NO ACCUMULATION OCCURRED ON VALLEY ROADS. THE
NRN MOUNTAINS AND MTN VALLEYS HAD A FAIRLY INTENSE PERIOD OF
HEAVY SNOW.

THE BAND IS BECOMING LESS ORGANIZED AS IT MOVES INTO CENTRAL AND
SWRN UT AND THE FRONT HAS ALREADY REACHED MILFORD. PRECIP WITH IT
IS STILL LIKELY RAIN IN MOST VALLEYS THAT WILL BE SWITCHING TO
SNOW OR A RAIN SNOW MIX OVER TIME. PRECIP HAS BEEN FALLING AS SNOW
HOWEVER IN THE CASTLE COUNTRY VALLEYS NEAR PRICE SINCE MID AFTN
LIKELY DUE TO TRAPPED COLD AIR AND SOME ACCUMULATION HAS BEEN
OCCURRING ON ROADWAYS IN THAT AREA. THIS PRECIP SHOULD END ONCE
THE NORTHWEST SURFACE FLOW BECOMES STRONG ENOUGH TO SCOUR OUT THE
TRAPPED COLD AIRMASS NOT LONG FROM NOW. ELSEWHERE IN CENTRAL AND
SRN UT THE THREAT OF ANY VALLEY TRAVEL IMPACTS REMAINS LOW AND NO
ADVISORIES PLANNED. THE BAND SHOULD DISSIPATE EARLY SUNDAY.

THE NEXT SHORT WAVE TO IMPACT THE CWA CURRENTLY EXTENDS FROM
CENTRAL ID TO NERN NV AND IS SLIDING SEWD. THIS SHOULD SPREAD SNOW
SHOWERS BACK INTO NRN UT AFTER MIDNIGHT. EXPECT CURRENT SCATTERED
COVERAGE TO EXPAND AS IT REACHES THE WASATCH FRONT AND CROSSES
OVER THE GSL. THIS SHOULD BE ALL SNOW AND COULD RESULT IN LOCAL
TRAVEL IMPACTS IN THE VALLEYS LATE TONIGHT INTO SUNDAY MORNING
WHERE HEAVIER SNOW SHOWERS OCCUR.

LOOKS LIKE A FAIRLY WELL DEFINED BREAK IN THE PRECIP WILL OCCUR
TOMORROW AFTN ONCE THIS NEXT WAVE PASSES AS RIDGING IS A LITTLE
MORE AMPLIFIED BETWEEN IT AND THE NEXT UPSTREAM WAVE CURRENTLY
NEARING THE BRITCOL COAST. THIS WAVE SHOULD ALSO BRING MORE SNOW
SHOWER ACTIVITY TO THE NRN CWA BETWEEN ABOUT 06Z AND 18Z MON AND
WILL PROBABLY HAVE AT LEAST SOME IMPACT ON THE MON MORNING
COMMUTE. 

CURRENT SUITE OF WINTER WEATHER ADVISORIES LOOKS ON TRACK AND NO
CHANGES PLANNED. DID CANCEL THE WIND ADVISORY AS WINDS DIMINISHED
FAIRLY RAPIDLY BEHIND THE FRONT.
 
PRECIP ENDS QUICKLY BY MON AFTN AS UPSTREAM RIDGING MOVES IN. THE
LATEST GFS IS A LITTLE WETTER AGAIN IN THE WARM ADVECTION NW FLOW
FOR TUE/TUE NIGHT BUT THIS WOULD LIKELY STILL NOT GENERATE VERY
MUCH PRECIP.

UPDATED EARLIER TO DROP WIND ADVISORY HEADLINE AND LOWERED WIND
SPEEDS. ALSO LOWERED POPS ACROSS THE N FOR THE EVE.

&&

.AVIATION...AT THE SLC TERMINAL VFR CONDITIONS WILL PREVAIL WITH
CIGS ABV 7000 FT THROUGH ABOUT 08-09Z WITH CIGS FALLING BELOW
6000 FT AFTER THAT. SNOW SHOWERS WILL OCCASIONALLY CROSS THE
AIRFIELD BETWEEN ABOUT 08Z AND 14Z WITH IFR CONDITIONS LIKELY IN
THE HEAVIER SHOWERS. WINDS WILL BE MOSTLY NORTHERLY BUT COULD
BECOME LIGHT AND VARIABLE OR LIGHT SOUTHERLY AFTER ABOUT 11-12Z. 

&&

.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 6 PM MST SUNDAY FOR UTZ517.

WY...WINTER WEATHER ADVISORY UNTIL 9 AM MST SUNDAY 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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