Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 250349
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
949 PM MDT TUE MAR 24 2015

.SYNOPSIS...A STORM SYSTEM WILL CROSS MAINLY NORTHERN UTAH AND
SOUTHWEST WYOMING THROUGH TONIGHT. STRONG HIGH PRESSURE ALOFT
WILL RETURN FOR THE LATTER HALF OF THE WEEK.

&&

.DISCUSSION...A SHORTWAVE TROUGH CONTINUES TO TRACK SOUTHEAST ACROSS
IDAHO AND INTO WYOMING THIS EVENING. MEANWHILE AN EXISTING SURFACE
BOUNDARY IS STILL IN PLACE ACROSS FAR SOUTHERN UTAH. PRECIPITATION
DEVELOPED OVER THE NORTHERN MOUNTAINS AND ALONG THE IDAHO BORDER
EARLIER TODAY AHEAD OF SAID TROUGH...WITH A FEW WEAK SHOWERS ALSO
EVIDENT ALONG THE SURFACE BOUNDARY IN SOUTHERN UTAH.

WITH THE TROUGH APPROACHING THE AREA...A RENEWED PUSH OF COLD AIR
ENTERED NORTHERN UTAH EARLIER THIS EVENING PER 3-HR SURFACE PRESSURE
CHANGE...AND MODELS SUGGEST H7 COLD ADVECTION STRENGTHENING OVER THE
AREA. THIS HAS PUSHED SHOWERS WELL INTO NORTHERN UTAH THIS
EVENING...ALTHOUGH PRECIP INTENSITY HAS BEEN RELATIVELY LIGHT.
HOWEVER...LOW LEVEL FORCING BUT NO UPPER SUPPORT DUE TO BOTH THE
UPPER JET AND H5 COLD AIR REMAINING NORTH OF UTAH IS LIMITING
PRECIPITATION TO NEAR THE H7 AND LOW-LEVEL BOUNDARIES AND MAINLY
ACROSS NORTHERN UTAH. AS A RESULT...EXPECT PRECIPITATION TO CONTINUE
TO TREND DOWNWARD THROUGH THE NIGHT.

ENHANCED NORTHERLY WINDS WILL EXIST IN SOME AREAS
OVERNIGHT...PARTICULARLY IN FAVORED DOWNSLOPE AREAS. LOCAL GUSTS
OVER 40 MPH NOT OUT OF THE QUESTION...BUT IN GENERAL THESE WINDS
WILL BE CONFINED MAINLY TO ALONG THE HIGHWAY 10 CORRIDOR AND THE
CANYONS OF WASHINGTON COUNTY.

UPDATED FORECAST TO TRIM POPS MAINLY ACROSS THE NORTHWEST...AND TO
MAKE MINOR ADJUSTMENTS TO SKY AND WINDS FOR THE REMAINDER OF THE
NIGHT.

&&

.AVIATION...NORTHWEST WINDS ARE EXPECTED TO CONTINUE AT THE SLC
TERMINAL THROUGH THE NIGHT. CIGS BETWEEN 3-4KFT IN RAIN SHOWERS THIS
EVENING WILL RISE TO 7KFT OR HIGHER AFTER 05 OR 06Z THEN SLOWLY
SCATTER OUT LATER TONIGHT AS SHOWERS DIMINISH OVER THE AREA.

&&

.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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