Prognostic Meteorological Discussion
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000
FXUS01 KWBC 292002
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
401 PM EDT FRI AUG 29 2014

VALID 00Z SAT AUG 30 2014 - 00Z MON SEP 01 2014

...HEAVY RAIN POSSIBLE FOR PORTIONS OF THE LOWER MISSISSIPPI
VALLEY AND TENNESSEE VALLEY...

LOW PRESSURE OVER THE UPPER MISSISSIPPI VALLEY WILL MOVE
NORTHEASTWARD TO SOUTHEASTERN ONTARIO BY SUNDAY.  MOISTURE FROM
THE GULF OF MEXICO WILL POOL ALONG THE ASSOCIATED FRONT AIDING IN
PRODUCING SHOWERS AND THUNDERSTORMS FROM THE UPPER/MIDDLE
MISSISSIPPI AND UPPER GREAT LAKES THAT WILL MOVE SLOWLY TO THE
LOWER GREAT LAKES/NORTHEAST BY SUNDAY.  IN ADDITION, LIGHT TO
MODERATE RAIN WILL DEVELOP OVER PARTS OF NORTHERN NEW ENGLAND ON
SUNDAY MORNING.

MEANWHILE, UPPER-LEVEL ENERGY OVER THE CENTRAL GULF COAST WILL
LIFT NORTHEASTWARD TO THE OHIO VALLEY BY SUNDAY MORNING.  MOISTURE
RICH AIR FROM THE GULF OF MEXICO WILL INVADE THE LOWER MISSISSIPPI
VALLEY AND MOVE NORTHEASTWARD TO THE OHIO VALLEY/LOWER GREAT LAKES
BY SUNDAY.  THE MOISTURE, UPPER-LEVEL ENERGY, AND UPPER-LEVEL JET
DYNAMICS WILL AID IN PRODUCING SHOWERS AND THUNDERSTORMS OVER THE
WESTERN/CENTRAL GULF COAST ON FRIDAY EVENING AND EXPAND NORTHWARD
UP THE LOWER MISSISSIPPI VALLEY WITH MODERATE RAIN BY SATURDAY
MORNING.  THE AREA OF SHOWERS AND THUNDERSTORMS, WITH MODERATE
RAIN, WILL EXTEND FROM THE OHIO VALLEY/LOWER GREAT LAKES TO PARTS
OF THE TENNESSEE VALLEY/LOWER MISSISSIPPI VALLEY BY SUNDAY
MORNING.  ADDITIONALLY, EASTERLY FLOW OFF THE ATLANTIC WILL AID IN
PRODUCING SHOWERS AND THUNDERSTORMS OVER FLORIDA AND THE SOUTHEAST
COAST THROUGH SUNDAY.

AN UPPER-LEVEL TROUGH OVER THE EASTERN PACIFIC WILL MOVE INLAND TO
THE ROCKIES BY SUNDAY.  THE ASSOCIATED FRONT WILL DEVELOP OVER THE
NORTHERN ROCKIES AND MOVE EASTWARD TO THE NORTHERN PLAINS AND
SOUTHWARD TO THE GREAT BASIN/CENTRAL ROCKIES.  SHOWERS AND
THUNDERSTORMS WILL DEVELOP ALONG THE BOUNDARY ON SATURDAY MORNING
OVER THE NORTHERN ROCKIES/NORTHERN HIGH PLAINS THAT WILL MOVE TO
THE UPPER MISSISSIPPI VALLEY BY SUNDAY.  SHOWERS AND THUNDERSTORMS
CONTINUE OVER PARTS OF THE NORTHERN/CENTRAL ROCKIES SATURDAY
EVENING INTO SUNDAY MORNING.  FURTHERMORE, SHOWERS AND
THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE CENTRAL ROCKIES ON
FRIDAY EVENING.


ZIEGENFELDER


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





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