Prognostic Meteorological Discussion
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FXUS01 KWBC 010838
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
437 AM EDT SUN MAY 01 2016

VALID 12Z SUN MAY 01 2016 - 12Z TUE MAY 03 2016

...HEAVY RAIN POSSIBLE FROM PARTS OF THE LOWER MISSISSIPPI VALLEY
TO THE CENTRAL APPALACHIANS...

...SNOW OVER PARTS OF THE CENTRAL ROCKIES...

A FRONT EXTENDING FROM THE LOWER GREAT LAKES TO THE WESTERN GULF
COAST WILL BECOME QUASI-STATIONARY WITH THE BOUNDARY INCHING TO
NEW ENGLAND COAST AND SOUTHWESTWARD TO THE LOWER MISSISSIPPI
VALLEY BY MONDAY EVENING.  THE SYSTEM WILL DEVELOP SHOWERS AND
THUNDERSTORMS FROM THE OHIO VALLEY TO THE LOWER MISSISSIPPI VALLEY
THAT WILL MOVE TO THE NORTHERN MID-ATLANTIC COAST TO THE LOWER
MISSISSIPPI VALLEY/WESTERN GULF COAST BY MONDAY EVENING.  THE
SHOWERS AND THUNDERSTORMS WILL ALSO EXPAND INTO PARTS OF THE
MID-ATLANTIC TO PARTS OF THE SOUTHEAST ON SUNDAY AFTERNOON INTO
EVENING CONTINUING THROUGH TO MONDAY.  RAIN WILL DEVELOP OVER
PARTS OF THE CENTRAL PLAINS EASTWARD TO THE GREAT LAKES AND PARTS
OF THE NORTHEAST AS WELL AS PARTS OF THE NORTHERN MID-ATLANTIC ON
SUNDAY MORNING, TOO.  THE RAIN WILL COME TO AN END OVER THE
CENTRAL PLAINS/MIDDLE MISSISSIPPI VALLEY BY MONDAY MORNING AND
OVER THE GREAT LAKES BY MONDAY EVENING.  THE RAIN WILL MOVE INTO
NORTHERN NEW ENGLAND BY SUNDAY EVENING AND CONTINUE OVER MOST OF
NEW ENGLAND THROUGH MONDAY EVENING.

MEANWHILE, ENERGY OVER THE SOUTHWEST WILL SLOWLY WEAKEN AND MOVE
EASTWARD TO THE GREAT LAKES/OHIO VALLEY BY MONDAY.  THE ENERGY
WILL PRODUCE RAIN AND HIGHEST ELEVATION SNOW OVER PARTS OF THE
CENTRAL/SOUTHERN ROCKIES THAT WILL END OVERNIGHT SUNDAY.  RAIN
WILL ALSO DEVELOP OVER PARTS OF THE SOUTHERN HIGH PLAINS AND MOVE
EASTWARD TO OKLAHOMA BY SUNDAY EVENING, ENDING BY MONDAY MORNING.
IN ADDITION, MOISTURE FROM THE GULF OF MEXICO WILL STREAM
NORTHWESTWARD OVER THE WESTERN GULF COAST INTO THE SOUTHERN HIGH
PLAINS.  SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE
SOUTHERN HIGH PLAINS TO THE WESTERN GULF COAST ON SUNDAY AFTERNOON
THAT WILL SLOWLY MOVE TO THE WESTERN GULF COAST BY MONDAY EVENING.
 ADDITIONALLY,UPPER-LEVEL ENERGY OVER SOUTHERN CALIFORNIA WILL
MOVE INTO PARTS OF THE SOUTHWEST BY MONDAY EVENING.  DIURNAL
HEATING AND THE UPPER-LEVEL ENERGY WILL INDUCE SHOWERS WITH
EMBEDDED THUNDERSTORMS OVER PARTS OF CENTRAL/SOUTHERN CALIFORNIA
EASTWARD TO PARTS OF THE CENTRAL/SOUTHERN ROCKIES ON MONDAY
AFTERNOON AND EVENING.

ELSEWHERE, ENERGY MOVING SOUTHWARD OUT OF CENTRAL CANADA WILL
TRIGGER AREAS OF RAIN OVER PARTS OF THE NORTHERN PLAINS ON MONDAY
MORNING THAT WILL EXPAND INTO PARTS OF THE MIDDLE MISSISSIPPI
VALLEY AND CENTRAL PLAINS BY MONDAY EVENING.  FURTHERMORE,
UPPER-LEVEL TROUGH WILL BEGIN TO MOVE ONSHORE OVER THE WEST COAST
BY MONDAY EVENING PRODUCING AN AREA OF RAIN OVER PARTS OF THE
PACIFIC NORTHWEST COAST AND NORTHERN CALIFORNIA.


ZIEGENFELDER


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