Prognostic Meteorological Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
000
FXUS01 KWBC 270850
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
449 AM EDT THU APR 27 2017

VALID 12Z THU APR 27 2017 - 12Z SAT APR 29 2017

...HEAVY RAIN POSSIBLE FROM PARTS OF THE SOUTHERN PLAINS TO THE
SOUTHERN OHIO/TENNESSEE VALLEYS...

...HEAVY SNOW POSSIBLE OVER PARTS OF THE NORTHERN/CENTRAL
ROCKIES...

A FRONT EXTENDING FROM THE GREAT LAKES SOUTHWARD TO CENTRAL GULF
COAST WILL MOVE EASTWARD TO THE NORTHEAST WHILE WEAKENING BY
FRIDAY MORNING.  SHOWERS AND THUNDERSTORMS WILL DEVELOP ALONG AND
AHEAD OF THE FRONT, LIKEWISE, FROM THE GREAT LAKES TO THE CENTRAL
GULF COAST THAT WILL ALSO MOVE EASTWARD TO OFF THE
NORTHEAST/MID-ATLANTIC COAST BY FRIDAY AFTERNOON.  SNOW WILL
DEVELOP OVER PARTS OF THE UPPER MISSISSIPPI VALLEY INTO PARTS OF
THE UPPER GREAT LAKES ENDING BY FRIDAY MORNING.  RAIN/FREEZING
RAIN WILL ALSO DEVELOP OVER PARTS OF THE WESTERN PORTION OF THE
UPPER PENINSULA OF MICHIGAN THROUGH THURSDAY EVENING.

MEANWHILE, ANOTHER FRONT OVER NORTHERN ROCKIES TO THE GREAT BASIN
WILL MOVE SOUTHEASTWARD AND LINK UP WITH THE AFOREMENTIONED
BOUNDARY OVER THE EASTERN U. S. ON THURSDAY EVENING OVER THE
SOUTHERN PLAINS INTO THE CENTRAL GULF COAST.  THE FRONT WILL LIFT
NORTHWARD INTO THE MIDDLE MISSISSIPPI VALLEY/WESTERN OHIO VALLEY
BY FRIDAY EVENING.  IN ADDITION, ENERGY ROTATING AROUND AN
UPPER-LEVEL LOW OVER JAMES BAY WILL INDUCE A REINFORCING FRONT
OVER THE GREAT LAKES ON FRIDAY EVENING, TOO.  THE SYSTEM WILL
PRODUCE SNOW AND LOWER ELEVATION RAIN OVER THE NORTHERN/CENTRAL
ROCKIES ON THURSDAY THAT WILL CONTINUE OVER THE REGION THROUGH
FRIDAY EVENING.  AS THE STORM MOVES SOUTHEASTWARD TO THE SOUTHERN
HIGH PLAINS, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF
THE CENTRAL/SOUTHERN HIGH PLAINS ON THURSDAY AFTERNOON THAT WILL
EXPAND EASTWARD TO THE MIDDLE MISSISSIPPI VALLEY BY FRIDAY MORNING
AND INTO PARTS OF THE OHIO VALLEY BY FRIDAY EVENING.
ADDITIONALLY, SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER THE
LOWER MISSISSIPPI VALLEY AND THE TENNESSEE VALLEY ON FRIDAY
AFTERNOON INTO EVENING.  FURTHERMORE, ADDITIONAL UPPER-LEVEL
ENERGY WILL MOVE INTO THE GREAT BASIN/SOUTHWEST/SOUTHERN ROCKIES
ON FRIDAY.  THE ENERGY WILL PRODUCE RAIN AND HIGHER ELEVATION SNOW
OVER PARTS OF THE SOUTHERN ROCKIES/SOUTHWEST ON FRIDAY INTO FRIDAY
EVENING.

ELSEWHERE, ONSHORE FLOW WILL AID IN PRODUCING RAIN AND HIGHER
ELEVATION SNOW OVER PARTS OF THE PACIFIC NORTHWEST ON THURSDAY
INTO EARLY FRIDAY MORNING.


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.