Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 180349
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
949 PM MDT WED SEP 17 2014

.SYNOPSIS...HIGH PRESSURE ALOFT OVER UTAH WILL SHIFT EAST OF THE
STATE TONIGHT. MOISTURE WILL INCREASE AHEAD OF A PACIFIC TROUGH
WHICH WILL SETTLE INTO THE GREAT BASIN LATE IN THE WEEK.

&&

.DISCUSSION...RIDGE AXIS THAT WAS OVERHEAD EARLY THIS AFTERNOON HAS
SHIFTED EAST OF THE AREA THIS EVENING. A WARM AIRMASS WAS IN PLACE
UNDERNEATH THE RIDGE TODAY AND THE SALT LAKE AIRPORT AS WELL AS A
COUPLE OTHER SITES SAW RECORD MAX TEMPERATURES AS A RESULT. MOISTURE
TO THE TUNE OF 0.8-1.1 INCHES OF PWAT MANAGED TO SPREAD INTO FAR
SOUTHERN UTAH TODAY WHICH LED TO SCATTERED THUNDERSTORMS
THERE...OTHERWISE CONVECTION ELSEWHERE WAS ISOLATED AND LIMITED
MAINLY TO THE HIGH TERRAIN. BESIDES THE THUNDERSTORMS OVER NORTHEAST
NEVADA THREATENING TO MOVE INTO UTAH OVERNIGHT...SHOWERS HAVE BEEN
REDUCED TO VERY ISOLATED COVERAGE ACROSS THE AREA.

REGARDING THE SHOWERS OVER NEVADA...THEY ARE ASSOCIATED WITH A WEAK
DISTURBANCE LIFTING NORTHEAST INTO IDAHO...SO EXPECT THEM TO
CONTINUE THROUGH THE NIGHT WITH SOME CROSSING FAR NORTHWEST UTAH.
THIS IS IN ADVANCE OF A LARGER PACIFIC TROUGH WHICH WILL IMPACT THE
EASTERN GREAT BASIN TOMORROW. THE TROUGH ITSELF WILL SPLIT...BUT THE
NORTHERN BRANCH WILL BE ASSOCIATED WITH A SHALLOW COLD FRONT WHICH
WILL PUSH THROUGH NORTHERN UTAH LATE TOMORROW AFTERNOON THROUGH
TOMORROW EVENING. SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG THIS
BOUNDARY...WITH SOME STRONG STORMS POSSIBLE. OTHERWISE ACROSS
SOUTHERN AND EASTERN PORTIONS OF THE FORECAST AREA...ISOLATED TO
SCATTERED SHOWERS CAN BE EXPECTED TOMORROW. SHOWERS WILL CONTINUE
INTO FRIDAY BEFORE TAPERING OFF LATE IN THE AFTERNOON AS THE AIRMASS
DRIES BEHIND THE STORM.

THE SPLITTING STORM SYSTEM WILL LEAVE A CLOSED LOW OFF THE SOCAL
COAST ON FRIDAY. THIS LOW WILL MOVE INLAND FOR THE
WEEKEND...BRINGING AND INCREASING TREND FOR SHOWERS ONCE AGAIN.

UPDATED FORECAST MAINLY TO REDUCE POP/SKY FOR SOME AREAS FOR THE
REMAINDER OF THE NIGHT.

&&

.AVIATION...VFR CONDITIONS ARE EXPECTED THROUGH THE OVERNIGHT
PERIOD AT THE KSLC TERMINAL. SOUTHEAST WINDS ARE EXPECTED THROUGH
MUCH OF THE DAY THURSDAY...INCREASING IN SPEED AFTER 1200 UTC.

&&

.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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