Prognostic Meteorological Discussion
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000
FXUS01 KWBC 282020
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
419 PM EDT FRI AUG 28 2015

VALID 00Z SAT AUG 29 2015 - 00Z MON AUG 31 2015

...HEAVY RAIN POSSIBLE OVER PARTS OF THE UPPER/MIDDLE MISSISSIPPI
VALLEY...

...HEAVY RAIN POSSIBLE FOR COASTAL AREAS IN THE PACIFIC
NORTHWEST...

...HEAVY RAIN LIKELY FOR SOUTHERN FLORIDA WITH TROPICAL STORM
ERIKA...

A STORM SYSTEM OVER THE CENTRAL PLAINS WILL CONTINUE ITS PATH
EASTWARD THROUGH THE WEEKEND. SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO DEVELOP ALONG AND AHEAD OF THE COLD FRONT, WHICH WILL
SPAN FROM OKLAHOMA TO NORTHERN ILLINOIS. SCATTERED TO WIDESPREAD
SHOWER ACTIVITY WILL ALSO DEVELOP NEAR THE WARM FRONT AS IT LIFTS
FROM ILLINOIS/INDIANA INTO THE GREAT LAKES REGION THIS WEEKEND.
PERIODS OF HEAVY RAIN WILL BE POSSIBLE FOR THE UPPER MIDWEST AND
MIDDLE MISSISSIPPI VALLEY; WHICH MAY LEAD TO LOCALIZED FLASH
FLOODING.

A COLD FRONT WILL PUSH ONSHORE THIS WEEKEND FROM THE EAST PACIFIC,
MAKING ITS WAY THROUGH THE INTERMOUNTAIN WEST INTO THE NORTHERN
PLAINS BY SUNDAY. COASTAL AREAS ARE EXPECTED TO HAVE HIGHER
RAINFALL INTENSITY AND COVERAGE AS THIS SYSTEM PROGRESSES INLAND.
ADDITIONALLY, SOME SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER
PARTS OF THE NORTHERN INTERMOUNTAIN REGION/NORTHERN ROCKIES BY
SATURDAY EVENING. MONSOONAL MOISTURE AND DAYTIME HEATING WILL
GENERATE CONVECTIVE ACTIVITY FOR PORTIONS OF THE SOUTHERN/CENTRAL
ROCKIES AND THE SOUTHWEST ALSO THROUGH SATURDAY EVENING.

A LARGE PORTION OF THE SOUTHEAST STATES WILL HAVE SCATTERED TO
WIDESPREAD SHOWERS AND THUNDERSTORMS THROUGH SUNDAY AS EASTERLY
FLOW OFF THE ATLANTIC STREAMS IN MOISTURE ALONG AN OLD BOUNDARY
OVER THE AREA. AS TROPICAL STORM ERIKA TAKES A NORTHWARD TRACK,
BANDS OF HEAVY RAIN WILL MOVE INTO SOUTHERN FLORIDA. FLASH
FLOODING WILL BE POSSIBLE ON SATURDAY AND SUNDAY.


CAMPBELL



GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
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