Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 240343
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
943 PM MDT SAT MAY 23 2015

.SYNOPSIS...THE UPPER LEVEL LOW PRESSURE SYSTEM OVER EXTREME EASTERN
UTAH WILL CONTINUE EAST INTO THE CENTRAL ROCKIES TONIGHT INTO
SUNDAY. WEAK HIGH PRESSURE ALOFT WILL SETTLE OVER THE STATE
MONDAY...FOLLOWED BY THE NEXT STORM SYSTEM IMPACTING MAINLY NORTHERN
UTAH MIDWEEK.

&&

.DISCUSSION...THE UPPER LOW REMAINS CENTERED HALFWAY DOWN THE
UTAH/COLORADO BORDER THIS EVENING WHILE A FAIRLY MOIST AIRMASS IS
STILL IN PLACE OVER UTAH. GFS/NAM SUGGEST PRECIPITABLE WATER VALUES
STILL BETWEEN 0.6-0.75 INCHES ACROSS MUCH OF THE WESTERN AND
SOUTHERN UTAH VALLEYS. THE MOISTURE CONTINUES TO WRAP AROUND THE LOW
CENTER...WITH GREATER CLOUD COVER COINCIDING WITH THE MORE MOIST
AIRMASS...WHILE SKIES HAVE TRENDED CLEARER ACROSS THE NORTHEASTERN
QUADRANT OF THE FORECAST AREA.

PRECIPITATION CONTINUES IN THE WRAPAROUND AREA...THE BULK OF THIS
EXTENDING FROM EASTERN NEVADA THROUGH SOUTHERN UTAH. PRECIPITATION
IN THIS AREA IS EXPECTED TO GRADUALLY DECREASE THROUGH THE NIGHT
EXCEPT FOR SOUTHERN UTAH WHERE LOW LEVEL CONVERGENCE IS AN
ADDITIONAL FACTOR ALONG WITH THE WARM ADVECTION ALOFT. A FEW
SHOWERS/THUNDERSTORMS ARE STILL IN PLACE AT THIS TIME ACROSS MAINLY
THE HIGHER TERRAIN OF THE UINTAS AND EAST-CENTRAL UTAH. THIS IS
OWING TO SOME INSTABILITY UNDERNEATH THE COLD POOL ALOFT...BUT AS
THE NIGHT WEARS ON AND SURFACE TEMPERATURES DROP THE INSTABILITY AND
ASSOCIATED SHOWERS SHOULD CONTINUE TO DIMINISH. OVERALL...RELATIVELY
LITTLE ACTIVITY EXPECTED ACROSS THE NORTH THE REST OF THE NIGHT
WHILE PORTIONS OF SOUTHERN UTAH WILL CONTINUE TO BE WET.

THE LOW WILL BE WELL INTO COLORADO AND WYOMING TOMORROW.
HOWEVER...EXPECT CONVECTIVE DEVELOPMENT AS THE AIRMASS REMAINS
MOIST. WEAK RIPPLES EXPECTED IN THE NORTH/NORTHWEST FLOW WILL AID
DEVELOPMENT OF STORMS. OTHERWISE...OVERALL TREND WILL BE WARMER AND
DRIER THE NEXT COUPLE OF DAYS.

UPDATED THE FORECAST MAINLY TO REDUCE POP/SKY FOR THE REMAINDER OF
THE NIGHT FOR ALL BUT THE FAR SOUTH.

&&

.AVIATION...SOUTH WINDS ARE EXPECTED TO RETURN TO THE SLC TERMINAL
AFTER 04-05Z. OTHERWISE...EXPECT VFR CONDITIONS TO PREVAIL UNDER
MID/HIGH CLOUDS.

&&

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

$$

CHENG

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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