Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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941
FXUS65 KSLC 250349
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
948 PM MDT SUN APR 24 2016

.SYNOPSIS...A STORM SYSTEM ALONG THE WEST COAST WILL MOVE INTO
THE GREAT BASIN TONIGHT...THEN SLOWLY EAST ACROSS UTAH ON MONDAY.
YET ANOTHER STORM SYSTEM WILL IMPACT THE AREA TOWARDS THE END OF
THE WEEK.

&&

.DISCUSSION...THE LARGE-SCALE PATTERN THIS EVENING CONSISTS OF SOUTH-
SOUTHWEST FLOW OVER UTAH WHILE UPSTREAM AN UPPER TROUGH HAS SHIFTED
INLAND OVER CENTRAL CALIFORNIA. A 110KT 300MB JET IS PUNCHING SOUTH
ALONG THE BACKSIDE OF THE TROUGH AND AS A RESULT THE TROUGH IS
EXPECTED TO PINCH INTO A CLOSED LOW LATE TONIGHT OR EARLY TOMORROW
MORNING OVER CENTRAL AND SOUTHERN NEVADA. MEANWHILE...MOISTURE HAS
STARTED TO WORK ITS WAY INTO UTAH AHEAD OF THE STORM.

CURRENTLY SEEING A FEW WEAK SHOWERS ACROSS NORTHWEST UTAH WHILE
CEDAR CITY RADAR INDICATES A BROAD AREA OF WEAK RETURNS ASSOCIATED
WITH A VORT LOBE ROTATING NORTH THROUGH UTAH. BECAUSE THE BOUNDARY
LAYER REMAINS QUITE DRY ACROSS SOUTHERN UTAH...THE BULK OF THESE
RETURNS ARE LIKELY VIRGA WHILE NORTHERN UTAH BEING SOMEWHAT MORE
MOIST WILL HAVE A BETTER CHANCE INITIALLY OF SEEING PRECIPITATION
REACH THE GROUND. AS A RESULT...SOME OF THE NORTHERN MOUNTAINS COULD
SEE PRECIPITATION FILL IN LATER TONIGHT AS THE AFOREMENTIONED VORT
LOBE REACHES THAT AREA. EXPECT SHOWER ACTIVITY TO INCREASE TOMORROW
WITH THE APPROACH OF THE TROUGH...BUT IT IS EXPECTED THAT THE BEST
CHANCE OF PRECIPITATION WILL BE ASSOCIATED WITH THE WRAPAROUND
MOISTURE WHICH WILL FILL IN ACROSS MUCH OF THE AREA TOMORROW EVENING
AND CONTINUING INTO TUESDAY. SNOW LEVELS WITH THIS STORM SHOULD
BOTTOM OUT NEAR 7000FT WITH ACCUMULATING SNOW FOR THE HIGHER TERRAIN.

UPDATED THE FORECAST MAINLY TO ADJUST POPS AND SKY PER LATEST TRENDS
AND TO INCREASE WINDS ACROSS SOUTHERN AND WEST-CENTRAL UTAH FOR
TONIGHT.

&&

.AVIATION...WINDS AT THE SLC TERMINAL ARE EXPECTED TO SWITCH TO THE
SOUTHEAST BY 04-05Z. CIGS WILL REMAIN ABOVE 7K FT AGL THROUGH AT
LEAST 09Z WITH A 40 PERCENT CHANCE OF REMAINING ABOVE 7K FT AGL
THROUGH 18Z.

&&

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

$$

CHENG/DEWEY

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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