Prognostic Meteorological Discussion
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FXUS01 KWBC 281859
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
259 PM EDT TUE MAR 28 2017

VALID 00Z WED MAR 29 2017 - 00Z FRI MAR 31 2017

...SEVERE THUNDERSTORMS OVER THE SOUTHERN PLAINS TODAY - SLIGHT
RISK WEDNESDAY AND THURSDAY FOR MIDDLE/LOWER MISSISSIPPI AND
TENNESSEE VALLEYS...

...HEAVY SNOW LIKELY FOR THE NORTHERN CASCADES AND THE CENTRAL
ROCKIES...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE PACIFIC NORTHWEST AND THE
CENTRAL/SOUTHERN PLAINS/LOWER MISSISSIPPI VALLEY...

SHOWERS AND THUNDERSTORMS DEVELOPED EARLY THIS MORNING AS A
BACKDOOR COLD FRONT PUSHED INTO THE NORTHEAST AND MID-ATLANTIC
REGIONS AND AS SEPARATE COLD FRONT MOVED INTO THE APPALACHIAN
REGION FROM THE WEST. PRECIPITATION WILL PERSIST INTO WEDNESDAY AS
THE FRONTAL BOUNDARY PUSHES OFFSHORE. MUCH OF THE NORTHEAST AND
GREAT LAKES REGION WILL REMAIN COOLER AS COLD CANADIAN AIR SEEPS
IN WITH THE SURFACE HIGH.
ADDITIONALLY, SNOW WITH A FEW POCKETS OF RAIN/FREEZING RAIN, WILL
BE POSSIBLE THROUGH WEDNESDAY FOR PORTIONS OF NEW ENGLAND.

AN UPPER-LEVEL LOW WILL SLOWLY EXIT THE ROCKIES AND MOVE EASTWARD
INTO THE ADJACENT HIGH PLAINS ALLOWING FRONTOGENESIS OVER MUCH OF
TEXAS AND OKLAHOMA. RAIN AND HIGHER ELEVATION SNOW IS FORECAST FOR
PORTIONS OF THE CENTRAL/SOUTHERN ROCKIES AND THE ADJACENT HIGH
PLAINS THROUGH WEDNESDAY EVENING. THE SHOWERS AND THUNDERSTORMS
WILL EXPAND EASTWARD INTO THE MIDDLE AND LOWER MISSISSIPPI VALLEY
-- TAPERING OFF OVER THE SOUTHERN PLAINS. THE STORM PREDICTION
CENTER HAS IDENTIFIED MUCH OF OKLAHOMA AND NORTH/CENTRAL TEXAS AS
HAVING A SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING -- WITH MODERATE RISK OVER SOUTHWEST OKLAHOMA AND WESTERN
NORTH TEXAS. THE THREAT AREA FOR SEVERE WEATHER WILL SHIFT TO THE
MIDDLE AND LOWER MISSISSIPPI VALLEY AND THE WESTERN EXTENT OF THE
TENNESSEE VALLEY ON WEDNESDAY AND THURSDAY. ADDITIONALLY, PERIODS
OF HEAVY RAINFALL WILL BE POSSIBLE TODAY OVER PORTIONS OF OKLAHOMA
AND TEXAS AND ACROSS THE MIDWEST ON WEDNESDAY.

MUCH OF THE PACIFIC NORTHWEST WILL HAVE WIDESPREAD PRECIPITATION
THANKS TO ONSHORE FLOW ALONG WITH MULTIPLE UPPER-LEVEL
DISTURBANCES.
RAIN AND HIGHER ELEVATION SNOW IS FORECAST FROM WASHINGTON TO
NORTHERN CALIFORNIA AND EAST THROUGH THE GREAT BASIN AND THE
INTERMOUNTAIN WEST COASTAL AREAS WILL LIKELY HAVE PERIODS OF
HEAVIER RAINFALL INTENSITY. THE NORTHERN CASCADES AND SECTIONS OF
THE CENTRAL ROCKIES WILL LIKELY HAVE HEAVY SNOW OVER THE NEXT FEW
DAYS.


CAMPBELL


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP
$$





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