Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 240451
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
951 PM MST FRI JAN 23 2015

.SYNOPSIS...STRONG HIGH PRESSURE WILL BUILD INTO THE WESTERN
STATES THROUGH EARLY NEXT WEEK...BEFORE A WEAK STORM SYSTEM PASSES
THROUGH THE AREA MONDAY NIGHT INTO TUESDAY.

&&

.DISCUSSION...THE WEAK MID LEVEL WAVE WHICH RESULTED IN A LITTLE
LIGHT SNOW NEAR THE UINTAS...BUT OTHERWISE BROUGHT LITTLE MORE
THAN AN INCREASE IN MID AND HIGH LEVEL CLOUD COVER...IS CURRENTLY
NEAR THE FOUR CORNERS REGION AND MOVING AWAY FROM THE FORECAST
AREA. IN ITS WAKE A NORTHERLY SURFACE GRADIENT COUPLED WITH 700MB
COLD ADVECTION IS ALLOWING FOR AN ENHANCEMENT IN WINDS THROUGH THE
GAPS OF SOUTHWEST UT. WIND GUSTS HAVE BEEN REACHING THE MID 40 MPH
RANGE...HOWEVER MODELS SUGGEST THESE WINDS SHOULD PEAK THIS
EVENING THEN VERY GRADUALLY WEAKEN OVERNIGHT. AS SUCH HAVE NO
PLANS TO ISSUE HIGHLIGHTS FOR THIS MARGINAL EVENT.

MID LEVEL RIDGING CURRENTLY BUILDING INTO THE NORTHERN GREAT BASIN
BEHIND THE DEPARTING WAVE WILL STRENGTHEN THROUGH THE WEEKEND.
THIS WILL RESULT IN CONSIDERABLE WARMING ALOFT AND STRENGTHENING
VALLEY INVERSIONS THROUGH MONDAY. THIS THIS INVERSION CYCLE WILL
LIKELY BE SHORT LIVED HOWEVER...AS AN UPPER LOW LIFTS NORTHWARD
THROUGH THE REGION MONDAY NIGHT INTO TUESDAY. THE RESULTANT
COOLING ALOFT WILL LIKELY BE ENOUGH TO SIGNIFICANTLY WEAKEN IF NOT
COMPLETELY DISLODGE ANY STAGNANT AIRMASSES WHICH DO DEVELOP.
ALTHOUGH THIS SYSTEM WILL TAP TROPICAL MOISTURE AS IT BEGINS TO
LIFT NORTHWARD TOWARD THE WESTERN CONUS...THIS TAP WILL BECOME CUT
OFF BEFORE THIS SYSTEM REACHES THE FORECAST AREA. WILL LIKELY SEE
A PERIOD OF VALLEY RAIN AND MOUNTAIN SNOWFALL WITH THIS FEATURE
HOWEVER AMOUNTS WILL LIKELY REMAIN ON THE LIGHT SIDE.

UPDATED EARLIER TO REDUCE CLOUD COVER AND REMOVE EVENING
WORDING.

&&

.AVIATION...VFR CONDITIONS WITH SOUTH WINDS WILL PREVAIL AT KSLC
THROUGH SATURDAY MORNING.

&&

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

$$

SEAMAN

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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