Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 271702
AFDSLC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1102 AM MDT SAT SEP 27 2014

.SYNOPSIS...A COOL PACIFIC SYSTEM WILL IMPACT THE EASTERN GREAT
BASIN THROUGH MONDAY. A BROAD UPPER TROUGH WILL REMAIN OVER THE
EASTERN GREAT BASIN THROUGH THE MIDDLE PART OF THE WEEK.

&&

.DISCUSSION...A DEEP CLOSED LOW IS CENTERED OVER EAST CENTRAL CA
THIS MORNING WITH A DEEP MOIST SOUTHERLY FLOW UP THE EAST SIDE OF
THE LOW INTO UT. THE BULK OF THE PRECIP HAS BEEN CONFINED TO THE
WRN CWA SO FAR TODAY WITH AREAS OF HEAVY RAIN. THERE HAVE BEEN
REPORTS OF FLASH FLOODING ACROSS PORTIONS OF WASHINGTON CO AND
EXPECT THIS TO PERSIST AND SPREAD EAST AS THE DAY GOES ON AND THE
HEAVY RAIN BAND SHIFTS EAST.

WILL KEEP THE EXISTING FLASH FLOOD WATCH IN EFFECT. HAVE ALSO
TRANSITIONED TO AN AREA FLOOD WARNING TO COVER A LARGER AREA OF
SRN UT AS FLASH FLOODING COULD BECOME FAIRLY WIDESPREAD THRU MID
AFTN. THERE IS ALSO A SEVERE THREAT FOR SRN UT AS GOOD UPPER
SUPPORT ON THE EAST SIDE OF THE CLOSED LOW INCREASES THRU THE
AFTN.

RAINFALL WILL REMAIN WIDESPREAD ACROSS THE NORTH AND SPREAD EAST
THRU THE REST OF TODAY. SOME DRYING AND STABILIZATION WILL BEGIN
TO SHIFT INTO THE WEST AND THIS WILL WORK EAST OVERNIGHT FINALLY
SHUTTING DOWN THE RAINFALL.

THE UPPER LOW MOVES ONLY SLOWLY EAST THRU TOMORROW AND EXPECTED AT
LEAST SCATTERED CONVECTION TO FILL IN ACROSS MUCH OF THE CWA.

UPDATED EARLIER TO RAISE POPS FOR MOST OF THE CWA EXCEPT FAR ERN
UT FOR THE MORNING. AFTN POPS LOOK GOOD. NO ADDITIONAL UPDATES
PLANNED.

&&

.AVIATION...SECOND ROUND OF SHOWERS AND THUNDERSTORMS WILL IMPACT
KSLC FROM AFTERNOON INTO EVENING.  WITH CONVECTIVE ACTIVITY...EXPECT
CEILINGS BELOW 7000 FT AND MVFR VISIBILITIES.  EXPECT PRIMARILY
NORTH TO NORTHEAST WINDS TO CONTINUE...THOUGH IN VICINITY OF
SHOWERS AND THUNDERSTORMS...ERRATIC WINDS WILL CONTINUE.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR UTZ010-012>016-
     019>021-517-518.

WY...NONE.
&&

$$

WILENSKY/BARJENBRUCH

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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