Prognostic Meteorological Discussion
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FXUS01 KWBC 270723
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
322 AM EDT WED MAY 27 2015

VALID 12Z WED MAY 27 2015 - 12Z FRI MAY 29 2015

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE NORTHERN APPALACHIANS/MID-ATLANTIC AND PARTS OF THE LOWER
GREAT LAKES/OHIO VALLEY...

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE SOUTHERN PLAINS TO THE CENTRAL HIGH PLAINS...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE SOUTHERN PLAINS...

A FRONT EXTENDING FROM THE UPPER GREAT LAKES TO THE SOUTHERN HIGH
PLAINS WILL SLOWLY DISSIPATE BY THURSDAY MORNING.  MOISTURE FROM
THE GULF OF MEXICO WILL FLOW NORTHWARD OVER THE EASTERN SEABOARD
THROUGH LATE WEDNESDAY NIGHT.  SHOWERS AND THUNDERSTORMS WILL
DEVELOP OVER PARTS OF THE CAROLINAS TO THE NORTHERN APPALACHIANS
THROUGH THURSDAY MORNING.  A SECOND PLUME OF MOISTURE WILL MOVE
NORTHWARD OVER THE SOUTHERN PLAINS/LOWER MISSISSIPPI VALLEY INTO
THE MIDDLE MISSISSIPPI VALLEY.  SHOWERS AND THUNDERSTORMS WILL
DEVELOP OVER PARTS OF THE SOUTHERN PLAINS/LOWER MISSISSIPPI VALLEY
INTO THE OHIO VALLEY THROUGH THURSDAY MORNING.  SHOWERS AND
THUNDERSTORM WILL LINGER OVER THE SOUTHERN APPALACHIANS INTO PARTS
OF THE SOUTHERN MID-ATLANTIC ON THURSDAY EVENING.  IN ADDITION,
SHOWERS AND THUNDERSTORMS WILL CONTINUE OVER PARTS OF THE SOUTHERN
PLAINS ON THURSDAY EVENING, TOO.

MEANWHILE, A SECOND FRONT OVER SOUTHERN CANADA WILL FLUCTUATE OVER
THE NORTHERN ROCKIES AND THE UPPER MIDWEST ON THURSDAY.  SHOWERS
AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE NORTHERN/CENTRAL
PLAIN ON WEDNESDAY NIGHT AND MOVE INTO THE UPPER MISSISSIPPI
VALLEY TO THE CENTRAL PLAINS BY THURSDAY EVENING.  ADDITIONALLY,
UPPER-LEVEL TROUGHING OVER THE ROCKIES/GREAT BASIN WILL AID IN
PRODUCING SHOWERS AND THUNDERSTORMS OVER PARTS OF THE REGION
THROUGH THURSDAY EVENING.


ZIEGENFELDER


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