Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 241610
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1010 AM MDT THU APR 24 2014

.SYNOPSIS...A WEAK SYSTEM WILL CROSS NORTHERN UTAH TODAY. A MILD
SOUTHWESTERLY FLOW WILL DEVELOP TONIGHT AND INCREASE FRIDAY
AHEAD OF THE NEXT PACIFIC STORM. THIS SYSTEM WILL CROSS THE
REGION LATE FRIDAY THROUGH SATURDAY.

&&

.DISCUSSION...A WEAK WARM FRONT IS BRINGING CLOUDS AND LOCAL LIGHT
SHOWERS TO THE FAR NRN CWA TODAY WHILE A MILD SWLY FLOW DEVELOPS
ACROSS THE REMAINDER OF THE AREA.

THIS IS DOWNSTREAM FROM A BROAD TROF IN THE ERN PAC THAT IS
FORECAST TO EVENTUALLY SWING INLAND FRI AND ACROSS THE GREAT BASIN
ON SAT. THE FRONTAL BOUNDARY GETS PUSHED INTO NWRN UT AFTER
MIDNIGHT TONIGHT THEN STALLS AS THE MAIN UPPER TROF DIGS DOWN THE
COAST AND THE UPPER LEVEL FLOW BACKS TO MORE SLY OVER THE CWA.

THIS DEEPENS A SURFACE LOW OVER SRN UT AND GENERATES FAIRLY STRONG
SOUTH WINDS SOUTH OF THE LOW DURING THE DAY TOMORROW. SPEEDS COULD
LOCALLY REACH MARGINAL WARNING LEVELS BUT OVERALL SHOULD BE IN THE
ADVISORY RANGE AND AM WILL LIKELY ISSUE THIS WITH THE AFTN
FORECASTS. SPEEDS SHOULD DROP OFF ONCE PRECIP STARTS. IT SHOULD
BEGIN ACROSS THE NW BY TOMORROW MORNING AND SLOWLY INCREASE THRU
THE DAY BECOMING WIDESPREAD DURING THE EVE AND FINALLY DEVELOPING
ACROSS ALL OF WRN UT AFTER MIDNIGHT.

MOST OF THE PRECIP OCCURS BEFORE THE COLDEST AIR WITH THIS TROF
ARRIVES. EXPECT SUFFICIENT SNOWFALL IN THE MTNS TO WARRANT AN
ADVISORY BUT THE MAIN IMPACT WOULD BE GENERALLY ABOVE ABOUT
7000-8000 FT STARTING LATE FRI NIGHT OR SAT MORNING. SO DO NOT
PLAN ON ISSUING ANY WINTER WEATHER HIGHLIGHT TODAY.

THE PRECIP WINDS DOWN SAT NIGHT AND THE UPSTREAM WAVE FOR LATER
IN THE WEEKEND INTO MON STILL APPEARS WEAK.

WILL ISSUE A BRIEF UPDATE TO RAISE POPS A LITTLE ACROSS THE FAR
NORTH FOR THE REST OF TODAY AND REDUCE SKY COVER OVER THE SOUTH.

&&

.AVIATION...OPERATIONAL WEATHER CONCERNS WILL REMAIN LIMITED AT THE
KSLC TERMINAL THROUGH THE VALID TAF PERIOD. OCCASIONAL GUSTY
SOUTHERLY WINDS ARE EXPECTED TO SHIFT TO THE NORTHWEST BETWEEN 19
AND 21Z. THERE IS A 20 PERCENT CHANCE WINDS WILL REMAIN SOUTHERLY
THROUGH THE DAY.

&&

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

$$

WILENSKY/KRUSE

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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