Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 301628
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1028 AM MDT TUE SEP 30 2014

.SYNOPSIS...A COLD PACIFIC NORTHWEST STORM SYSTEM WILL MOVE
THROUGH THE AREA THIS AFTERNOON THROUGH WEDNESDAY. HIGH PRESSURE
WILL BUILD OVER THE AREA THURSDAY THROUGH AT LEAST EARLY NEXT
WEEK.

&&

.DISCUSSION...THE LARGE PACIFIC LOW THAT IMPACTED THE FORECAST
AREA OVER THE LAST FEW DAYS IS NOW MOVING TOWARD THE CENTRAL
UNITED STATES. HOWEVER...A SECOND TROUGH CURRENTLY CENTERED OVER
THE PACIFIC NORTHWEST IS RAPIDLY MAKE ITS WAY TOWARD THE STATE.
MOISTURE AND INSTABILITY AHEAD OF THE SYSTEM HAVE PRODUCED CLOUDS
AND A FEW SHOWERS OVER NORTHERN UTAH AND EXPECT COVERAGE TO ONLY
INCREASE THIS AFTERNOON AND EVENING AS THE SYSTEM APPROACHES.

ASSOCIATED COLD FRONT WILL MOVE INTO NORTHERN UTAH TONIGHT AND
PUSH SOUTH THROUGH WEDNESDAY. MODELS CONTINUE TO INDICATE AIR AS
COLD AS -4C AT 700 MB WHICH WOULD BRING NORTHERN UTAH SNOW LEVELS
DOWN TO ABOUT 7500 FEET. HOWEVER...IMPACTS FROM THE SNOW SHOULD BE
LIMITED. PRECIP FOCUS SHOULD MOVE TO CENTRAL UTAH WEDNESDAY
MORNING AS THE TROUGH CONTINUES TO MOVE THROUGH THE AREA.

THE STORM IS EXPECTED TO EXIT BY TOMORROW NIGHT...SHUTTING OFF
PRECIP AT THAT TIME. WITH CLEARING BEHIND THE SYSTEM...THERE
REMAINS A POSSIBILITY OF FREEZING TEMPERATURES DOWN TO NORTHERN
UTAH MOUNTAIN VALLEYS THURSDAY MORNING. HIGH PRESSURE CENTERED
OVER CALIFORNIA WILL THEN BUILD OVER THE FORECAST AREA BEGINNING
THURSDAY...LASTING INTO AT LEAST EARLY NEXT WEEK.

NO UPDATES EXPECTED TO THE FORECAST THIS MORNING.

&&

.AVIATION... SHOWER OR TWO MAY IMPACT THE SLC TERMINAL BETWEEN 18
AND 19Z BRIEFLY LOWERING CEILINGS TO AROUND 6000 FEET AGL AND
CAUSING ERRATIC WINDS. ADDITIONAL SHOWERS/THUNDERSTORMS MAY DEVELOP
...30 PERCENT CHANCE...THIS AFTERNOON AFTER 22Z IN THE VICINITY OF
THE TERMINAL. THESE MAY CAUSE THE WINDS TO BECOME BRIEFLY ERRATIC
AND CAUSE CIGS TO LOWER BELOW 7K FT AGL. OTHERWISE...WINDS ARE
EXPECTED TO SHIFT FROM SOUTHEAST TO NORTHWEST BETWEEN 18 AND 19Z.

&&

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

$$

PUBLIC...TRAPHAGAN
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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