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672
FXUS65 KSLC 271551
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
951 AM MDT WED AUG 27 2014

.SYNOPSIS...AN UPPER LOW OVER CENTRAL UTAH WILL MOVE EAST OUT OF
THE AREA TONIGHT. HIGH PRESSURE WILL FOLLOW FOR THURSDAY AND
FRIDAY.

&&

.DISCUSSION...AN UPPER LOW SPINNING ACROSS THE FORECAST AREA THIS
MORNING WILL SLOWLY WORK ITS WAY EASTWARD THROUGH THE REMAINDER OF
THE DAY. AN EMBEDDED SHORTWAVE LIFTING NORTHWARD ALONG THE EASTERN
PERIPHERY OF THIS LOW IS RESULTING IN A CLUSTER OF SHOWERS AND
THUNDERSTORMS ACROSS EASTERN UT...WHILE A BROAD PLUME OF WRAP-
AROUND MOISTURE IS NOTED ACROSS SOUTHWEST WY/FAR NORTHERN
UT...WHERE AN ADDITIONAL AREA OF SHOWERS IS NOTED. GOES
PRECIPITABLE WATER IMAGERY SHOWS VALUES OF 0.75 TO 1 INCH ACROSS
NORTHERN AND CENTRAL UT...WHILE LOWER VALUES ARE NOTED ACROSS
SOUTHERN UT OWING TO SUBSTANTIAL DRYING ALOFT.

AS THE DAY WEARS ON AND THE UPPER LOW SLOWLY PROGRESSES
EASTWARD...ADDITIONAL SHOWERS AND THUNDERSTORMS ARE EXPECTED TO
FIRE THIS AFTERNOON...AS A COMBINATION OF LINGERING MOISTURE...A
COLD POOL ALOFT...AND A BIT OF SURFACE HEATING RESULT IN MODEST
INSTABILITY. THESE STORMS SHOULD BE MOST NUMEROUS ACROSS THE
HIGHER TERRAIN OF NORTHERN AND CENTRAL UT. LIGHT FLOW ALOFT SHOULD
YIELD VERY SLOW CELL MOVEMENT...WHICH COULD RESULT IN AN ISOLATED
HEAVY RAIN THREAT THIS AFTERNOON.

AS THIS UPPER LOW SHIFTS EAST OF THE AREA THIS EVENING...SHORTWAVE
RIDGING WILL BUILD ACROSS THE GREAT BASIN RESULTING IN A DRYING
AND WARMING TREND THROUGH FRIDAY.

UPDATED EARLIER TO ADJUST MORNING POPS/WX BASED ON RADAR
TRENDS...AND WILL LIKELY UPDATE LATER ON TO REMOVE MORNING
WORDING AND REFINE AFTERNOON POPS/WX IF NECESSARY.

&&

.AVIATION...LIGHT AND VARIABLE WINDS ARE EXPECTED TO BECOME
PRIMARILY NORTHWEST BETWEEN 17-18Z. SHOWERS AND POSSIBLY A FEW
THUNDERSTORMS WILL DEVELOP ACROSS THE SALT LAKE VALLEY THIS
AFTERNOON AND MAY CAUSE GUSTY AND ERRATIC WINDS AT TIMES. THERE
IS A 20 PERCENT CHANCE WINDS WILL REMAIN PRIMARILY SOUTH THROUGH
THE DAY.

&&

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

$$

SEAMAN/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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