Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 011615
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1015 AM MDT WED OCT 1 2014

.SYNOPSIS...A COOL PACIFIC STORM SYSTEM WILL MOVE THROUGH THE
AREA EARLY TODAY. HIGH PRESSURE WILL BUILD OVER THE AREA THURSDAY
THROUGH AT LEAST EARLY NEXT WEEK.


&&

.DISCUSSION...THE AXIS OF THE LONG WAVE TROUGH WILL BE OVER
WESTERN UTAH THIS MORNING AND SHIFT TO NEAR THE COLORADO BORDER BY
LATE THIS AFTERNOON. AREAS TO THE EAST OF THIS AXIS WILL CONTINUE
TO HAVE A THREAT OF SHOWERS...MAINLY THIS MORNING ACROSS THE
SOUTHERN PORTIONS OF THE FORECAST AREAS WHILE COLD CORE ALOFT WILL
LINGER A LITTLE LONGER OVER THE NORTH SO SHOWERS STILL A BET. HAVE
LOWERED POPS ACCORDINGLY OVER THE SOUTHWEST THIS MORNING AND OVER
REST OF SOUTHERN UTAH THIS AFTERNOON.

THE PW AT SLC HAS DROPPED SIGNIFICANTLY OVERNIGHT FROM 0.64 TO
0.34 WITH SUBSTANTIAL DRYING ABOVE 680 MB. THE 12Z SLC SOUNDING
ACTUALLY SHOWED A RESPECTABLE SUBSIDENCE INVERSION BETWEEN 650 AND
680 MB WHICH MEANS THAT THE SHOWER ACTIVITY TODAY WILL BE SHALLOW
SO NOT EXPECTING ANY HEAVY RAIN OR HEAVY SNOW WITH ANY OF THESE
SHOWERS. WILL DROP THE MENTION OF THUNDERSTORMS ACROSS MOST OF THE
FORECAST AREA DUE TO THIS SUBSIDENCE INVERSION.

HAVE ADJUSTED WINDS TO INCREASE THEM OVER THE WESTERN VALLEYS AND
OVER THE DOWNSLOPE AREAS OF CENTRAL AND EASTERN UTAH. WILL TAKE A
CLOSER LOOK AT THE POTENTIAL OF STRONG WINDS IN DIXIE TONIGHT AS
SURFACE GRADIENT SHOWS 7 MB BETWEEN GRAND CANYON AND CEDAR CITY
WITH H7 WINDS OF 25-35 KTS WHICH COULD EASILY SUPPORT WIND
ADVISORY LEVEL WINDS.

TEMPERATURES LOOK REASONABLE FOR TODAY WITH VALUES ABOUT 10-15
DEGREES BELOW NORMAL.

&&

.AVIATION...WEST NORTHWEST WINDS WILL OCCUR AT THE SLC TERMINAL
THIS MORNING BUT THEN SHIFT MORE NORTHERLY THIS AFTERNOON.
ISOLATED SHOWERS WITH ERRATIC GUSTY WINDS MAY BRIEFLY LOWER THE
CIGS BELOW 7K FT AGL THROUGH 00Z.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...HARD FREEZE WATCH FROM LATE TONIGHT THROUGH THURSDAY MORNING FOR
     UTZ011-014-016.

WY...NONE.
&&

$$

PUBLIC...STRUTHWOLF
AVIATION...STRUTHWOLF

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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