Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 251722
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1022 AM MST TUE NOV 25 2014

.SYNOPSIS...A WARM FRONT WILL CROSS THE NORTHERN THIRD OF UTAH
AND SOUTHWEST WYOMING TODAY. HIGH PRESSURE WILL BUILD OVER THE
AREA MIDWEEK...AND REMAIN IN PLACE THROUGH THE UPCOMING WEEKEND.

&&

.DISCUSSION...A VARIETY OF WEATHER IS IMPACTING NORTHERN UTAH AND
SOUTHWEST WYOMING THIS MORNING. STRONG WARM AIR ADVECTION IS
ONGOING ACROSS NORTHERN UTAH...WITH 700MB TEMPERATURES FORECAST TO
INCREASE FROM NEAR -7C THIS MORNING TO -3C OR SO THIS AFTERNOON
ACROSS NORTHERN UTAH.

THE 12Z SLC RAOB INDICATES A SIGNIFICANT LAYER OF DRY AIR IN THE
LOW LEVELS WITH A WELL REPRESENTED WARM NOSE JUST ABOVE 700MB. 12Z
NAM BUFR SOUNDINGS CAPTURED BOTH FEATURES WELL AND INDICATE IT
WILL TAKE SEVERAL HOURS OF PRECIPITATION ALOFT BEFORE THE LOW
LEVELS WILL BE SUFFICIENTLY MOIST AT THE SURFACE TO REALIZE ANY
PRECIPITATION. MOST GUIDANCE SUGGESTS THE DRY LAYER WILL ERODE AT
LOGAN BETWEEN 18-19Z...SALT LAKE CITY AROUND 21-22Z. UPDATED THE
FORECAST TO DECREASE POPS/QPF THIS MORNING ACROSS THE VALLEYS AND
UINTA COUNTY WYOMING.

EXPECT ANY PRECIPITATION THAT DOES OCCUR ACROSS THE VALLEYS THIS
AFTERNOON/EVENING TO BE LIGHT. SNOW LEVELS WILL CONTINUE TO
INCREASE AND SHOULD BE ABOVE VALLEY FLOORS AND BENCHES BY THIS
AFTERNOON. ADJUSTED WX TYPE THIS AFTERNOON TO MATCH THIS TREND.

THE NEXT ISSUE IS THE THREAT OF HIGH WINDS ACROSS UINTA COUNTY
WYOMING THIS AFTERNOON INTO THIS EVENING. A TIGHTENING SURFACE
PRESSURE GRADIENT IS EVIDENT ON MORNING ANALYSIS. THIS...ALONG
WITH 65KT+ FLOW AT 700MB SHOULD ALLOW FOR WIND GUSTS IN EXCESS OF
58 MPH ACROSS THIS AREA. ISSUED A HIGH WIND WARNING FOR UINTA
COUNTY WYOMING. TRAVEL IMPACTS ALONG INTERSTATE 80 IN WYOMING CAN
BE EXPECTED...ESPECIALLY FOR HIGH PROFILE VEHICLES AND VEHICLES
TOWING LIGHT TRAILERS.

PRECIPITATION SHOULD END EARLY WEDNESDAY MORNING AS THE RIDGE
BUILDS INTO THE AREA...BRINGING INCREASING TEMPERATURES AND DRY
CONDITIONS FOR THE AREA THROUGH THE WEEKEND.

&&

.AVIATION...CEILINGS AT OR BELOW 6000FT AGL ARE EXPECTED TO BE THE
PRIMARY OPERATIONAL CONCERN AT THE KSLC TERMINAL THROUGH THIS
EVENING. LIGHT SHOWERS ARE POSSIBLE THIS AFTERNOON AFTER 18Z BUT
ADDITIONAL IMPACT TO THE TERMINAL IS EXPECTED TO BE MINIMAL.
SOUTHERLY SURFACE WINDS ARE EXPECTED THROUGH THE DAY WITH ONLY A 30
PERCENT OF SWITCHING TO THE NORTHWEST BETWEEN 20-02Z.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WINTER WEATHER ADVISORY UNTIL 8 PM MST THIS EVENING FOR UTZ007.

WY...HIGH WIND WARNING UNTIL 9 PM MST THIS EVENING FOR WYZ021.

&&

$$

KRUSE/MERRILL

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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