Prognostic Meteorological Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12
000
FXUS01 KWBC 250828
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
427 AM EDT TUE APR 25 2017

VALID 12Z TUE APR 25 2017 - 12Z THU APR 27 2017

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE MIDDLE MISSISSIPPI VALLEY AND CENTRAL/SOUTHERN PLAINS...

...HEAVY RAIN POSSIBLE OVER PARTS OF NEW ENGLAND COAST...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE UPPER GREAT LAKES AND
MIDDLE MISSISSIPPI VALLEY...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE PACIFIC
NORTHWEST/NORTHERN CALIFORNIA...

LOW PRESSURE OVER THE CAROLINAS WILL MOVE NORTHWARD TO JUST SOUTH
OF LONG ISLAND NEW YORK BY WEDNESDAY.  THE SYSTEM WILL PRODUCE
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHERN MID-ATLANTIC
THAT WILL MOVE TO COASTAL SOUTHERN NEW ENGLAND BY WEDNESDAY
MORNING AND OFF THE NEW ENGLAND COAST BY WEDNESDAY EVENING.  THE
STORM WILL ALSO PRODUCE RAIN OVER PARTS OF THE NORTHERN
MID-ATLANTIC INTO PARTS OF THE LOWER GREAT LAKES AND SOUTHERN NEW
ENGLAND ON TUESDAY MORNING THAT WILL EXPAND NORTHWARD INTO
NORTHERN NEW ENGLAND BY TUESDAY EVENING.  THE RAIN WILL END OVER
THE LOWER GREAT LAKES BY WEDNESDAY MORNING AND OVER THE NORTHERN
MID-ATLANTIC BY WEDNESDAY EVENING, WHILE HANGING ON OVER THE NEW
ENGLAND COAST BY WEDNESDAY EVENING.

MEANWHILE, A FRONT EXTENDING FROM THE UPPER GREAT LAKES/UPPER
MISSISSIPPI VALLEY SOUTHWESTWARD TO THE SOUTHERN HIGH PLAINS AND
INTO THE SOUTHWEST WILL MOVE INTO THE UPPER GREAT LAKES SOUTHWARD
TO THE LOWER MISSISSIPPI VALLEY/WESTERN GULF COAST BY WEDNESDAY
EVENING.  THE SYSTEM WILL PRODUCE RAIN AND SNOW OVER PARTS OF THE
UPPER GREAT LAKES/UPPER MISSISSIPPI VALLEY THROUGH TUESDAY
EVENING.  OVERNIGHT TUESDAY, RAIN AND SNOW WILL RETURN TO THE
UPPER MISSISSIPPI VALLEY THROUGH WEDNESDAY EVENING.  IN ADDITION,
SOME AREAS OF RAIN/FREEZING RAIN WILL DEVELOP OVER PARTS OF THE
ARROWHEAD OF MINNESOTA AND THE WESTERN PORTION OF THE UPPER
PENINSULA OF MICHIGAN ON WEDNESDAY INTO WEDNESDAY EVENING.  THE
STORMS UPPER-LEVEL ENERGY WILL AID IN PRODUCING RAIN AND HIGHER
ELEVATION SNOW OVER THE NORTHERN/CENTRAL ROCKIES AND THE GREAT
BASIN THROUGH WEDNESDAY MORNING.  RAIN AND HIGHER ELEVATION SNOW
WILL DEVELOP OVER PARTS OF THE SOUTHERN ROCKIES ON TUESDAY
AFTERNOON INTO WEDNESDAY MORNING.

FURTHERMORE, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF
THE CENTRAL PLAINS THAT WILL EXPAND INTO THE MIDDLE MISSISSIPPI
VALLEY BY TUESDAY EVENING.  OVERNIGHT TUESDAY, SHOWERS AND
THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE ASSOCIATED FRONT
FROM PARTS OF THE GREAT LAKES/WESTERN OHIO VALLEY SOUTHWESTWARD TO
SOUTHERN PLAINS THAT WILL MOVE EASTWARD INTO THE MIDDLE/LOWER
MISSISSIPPI VALLEY BY WEDNESDAY EVENING.

IN THE MEANTIME, UPPER-LEVEL ENERGY WILL MOVE ONSHORE OVER THE
PACIFIC NORTHWEST ON TUESDAY AFTERNOON THAT WILL MOVE INLAND TO
THE GREAT BASIN/NORTHERN ROCKIES BY WEDNESDAY EVENING.  RAIN WILL
DEVELOP OVER PARTS THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA
BY TUESDAY EVENING.  OVERNIGHT TUESDAY, THE PRECIPITATION WILL
MOVE INLAND TO THE PARTS OF THE GREAT BASIN/NORTHERN ROCKIES.
SNOW WILL DEVELOP OVER PARTS OF THE CASCADES AND THE NORTHERN
ROCKIES BY WEDNESDAY MORNING.  BY WEDNESDAY EVENING, RAIN AND
HIGHER ELEVATION SNOW WILL MOVE INTO PARTS OF THE CENTRAL ROCKIES.



ZIEGENFELDER


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

$$




USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.