Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 220329
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
929 PM MDT THU AUG 21 2014

.SYNOPSIS...A WEAK SYSTEM WILL LIFT THROUGH SOUTHEASTERN UTAH
TONIGHT INTO FRIDAY. A COLD TROUGH WILL MOVE ACROSS NORTHERN UTAH
FRIDAY NIGHT AND SATURDAY. THE COLD FRONT WITH THIS SYSTEM WILL
MOVE INTO NORTHERN UTAH FRIDAY AFTERNOON THEN ACROSS THE STATE
FRIDAY NIGHT THROUGH SATURDAY.

&&

.DISCUSSION...A COOL UPPER TROF IS DIGGING INTO THE PACNW STATES
THIS EVENING. A WEAK UPPER LOW IS OVER THE LOWER CO RIVER VALLEY
WITH UTAH UNDER A SOUTHWESTERLY FLOW BETWEEN THESE FEATURES.

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS CONTINUE ACROSS THE
NORTHERN CWA THIS EVENING AND SHOULD PERSIST PAST MIDNIGHT UNDER
INCREASING UPPER SUPPORT FROM THE APPROACHING PACNW TROF.

SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ALSO PERSIST ACROSS
SOUTH CENTRAL UT THIS EVE AS THE WEAK LOW TO THE SOUTH BEGINS TO
OPEN AN LIFT NEWD. THIS PROCESS SHOULD SPREAD SHOWERS OVER MORE OF
THE SOUTHEAST TONIGHT LASTING INTO FRIDAY.

THE PACIFIC NORTHWEST TROF WILL BEGIN MOVING INTO THE GREAT BASIN
ON FRIDAY. THE ASSOCIATED COLD FRONT WILL ENTER NORTHERN UTAH ON
FRIDAY AFTERNOON...AND THEN SLIDE THROUGH MOST OF THE CWA FRIDAY
EVENING AND SATURDAY MORNING. THIS LOOKS TO BE THE FIRST FALL TROF
AND THE FRONT SHOULD HAVE PLENTY OF MOISTURE IN PLACE TO WORK WITH
LIKELY GENERATING WIDESPREAD PRECIP ACROSS THE NRN AND CENTRAL
CWA FRI NIGHT THRU SAT MORNING.

PRECIPITATION SHOULD TAPER OFF FAIRLY QUICKLY SATURDAY AFTERNOON
OR EVENING...AS COOL STABLE AIR MOVES INTO THE AREA BEHIND THE
TROUGH.

UPDATED FORECASTS EARLIER TO RAISE POPS SERN UT OVERNIGHT AND
KEEP SCATTERED COVERAGE OF PRECIP OVER A LARGER PORTION OF THE
NORTH. MADE A FEW TWEAKS TO SKY COVER AS WELL. NO ADDITIONAL
UPDATES PLANNED.

&&

.AVIATION...SOUTHERLY WINDS ARE EXPECTED TO PREVAIL THROUGH THE
NIGHT AT THE KSLC TERMINAL. THERE IS A 20 PERCENT CHANCE THAT
WINDS WILL BECOME LIGHT AND VARIABLE OR LIGHT NORTHERLY AT TIMES
BETWEEN 05-07Z. OUTFLOW FROM PASSING SHOWERS COULD ALSO CREATE
BRIEF ERRATIC GUSTS THROUGH THE NIGHT AND INTO THE MORNING.

&&

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

$$

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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