Prognostic Meteorological Discussion
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046
FXUS01 KWBC 062025
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
425 PM EDT FRI MAY 06 2016

VALID 00Z SAT MAY 07 2016 - 00Z MON MAY 09 2016

...HEAVY RAIN AND HIGHEST ELEVATION SNOW OVER THE SIERRAS...

...HEAVY RAIN AND HIGHEST ELEVATION SNOW OVER THE WIND RIVER, BIG
HORN, AND LARAMIE MOUNTAINS IN WYOMING...

...THE TEMPERATURE WILL BE 10 TO 15 DEGREES BELOW AVERAGE OVER THE
SOUTHWEST AND PARTS OF CALIFORNIA...

UPPER-LEVEL LOW OVER THE MID-ATLANTIC WILL SLOWLY WEEKEND AND MOVE
OUT OVER THE WESTERN ATLANTIC BY OVERNIGHT SATURDAY.  RAIN WILL
DEVELOP FROM PARTS OF NORTHERN NEW ENGLAND/NORTHERN APPALACHIANS
SOUTHWARD TO THE CAROLINAS/CENTRAL APPALACHIANS ON FRIDAY EVENING
THAT WILL END OVER THE CAROLINAS AND CENTRAL APPALACHIANS BY
SATURDAY AFTERNOON.  THE RAIN WILL CONTINUE OVER PARTS OF THE
NORTHERN APPALACHIANS/NEW ENGLAND THROUGH SATURDAY NIGHT WHEN THE
PRECIPITATION WILL MERGE WITH THE SYSTEM MOVING EASTWARD FROM THE
GREAT LAKES.

MEANWHILE, ANOTHER UPPER-LEVEL LOW OVER CALIFORNIA WILL MOVE TO
THE CENTRAL ROCKIES/GREAT BASIN BY SUNDAY MORNING.  THE SYSTEM
WILL PRODUCE RAIN WITH EMBEDDED THUNDERSTORMS FROM CALIFORNIA TO
PARTS OF THE NORTHERN/CENTRAL ROCKIES AND THE SOUTHWEST THAT WILL
CONTINUE OVER PARTS OF THE CENTRAL/NORTHERN ROCKIES AND PARTS OF
THE GREAT BASIN/CALIFORNIA THROUGH SUNDAY MORNING.  THE RAIN WITH
EMBEDDED THUNDERSTORMS WILL END OVER THE SOUTHWEST/SOUTHERN
ROCKIES BY EARLY SUNDAY MORNING.  IN ADDITION, HIGHEST ELEVATION
SNOW WILL DEVELOP OVER PARTS OF THE SIERRAS AND MOUNTAINS OF
WYOMING THROUGH SUNDAY.

ADDITIONALLY, A FRONT EXTENDING FROM THE UPPER GREAT LAKES ROUGHLY
SOUTHWESTWARD TO THE CENTRAL ROCKIES WILL MOVE SOUTH AND EASTWARD
TO THE NORTHEAST/MID-ATLANTIC WESTWARD TO THE CENTRAL PLAINS BY
SUNDAY.  SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF
THE BOUNDARY FROM THE UPPER MISSISSIPPI VALLEY/UPPER GREAT LAKES
TO THE CENTRAL HIGH PLAINS BY FRIDAY EVENING THAT WILL EXTEND FROM
THE GREAT LAKES/OHIO VALLEY WESTWARD TO THE CENTRAL HIGH PLAINS BY
SATURDAY AFTERNOON.  BY SATURDAY EVENING, RAIN WILL BEGIN TO
DEVELOP OVER PARTS OF THE LOWER GREAT LAKES AND MOVE EASTWARD INTO
THE NORTHEAST SOUTHWARD TO THE MID-ATLANTIC BY SUNDAY.  ALSO BY
SUNDAY, SHOWERS AND THUNDERSTORMS WILL MOVE INTO THE SOUTHERN OHIO
VALLEY WESTWARD TO THE CENTRAL PLAINS.


ZIEGENFELDER


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