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 17 18
000
FXUS01 KWBC 240825
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
424 AM EDT MON APR 24 2017

VALID 12Z MON APR 24 2017 - 12Z WED APR 26 2017

...HEAVY RAIN POSSIBLE OVER THE CAROLINAS...

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

...SNOW POSSIBLE FOR PARTS OF THE NORTHERN/CENTRAL ROCKIES AND THE
CASCADES...

LOW PRESSURE OVER THE SOUTHEAST WILL SLOWLY MOVE NORTHWARD TO THE
NORTH CAROLINA COAST BY TUESDAY EVENING.  THE SYSTEM WILL PRODUCE
SHOWERS AND THUNDERSTORMS OVER PARTS OF THE SOUTHEAST AND PORTIONS
OF THE SOUTHERN MID-ATLANTIC THAT WILL MOVE OFF THE SOUTHEAST
COAST BY TUESDAY MORNING AND REMAIN OVER PARTS OF THE SOUTHERN
MID-ATLANTIC COAST THROUGH TUESDAY EVENING.  RAIN WILL ALSO
DEVELOP OVER THE VIRGINIAS THAT WILL SLOWLY EXPAND NORTHWARD INTO
THE NORTHERN MID-ATLANTIC/LOWER GREAT LAKES AND SOUTHERN NEW
ENGLAND BY TUESDAY MORNING AND CONTINUE TO EXPAND NORTHWARD INTO
NORTHERN NEW ENGLAND BY TUESDAY EVENING.

MEANWHILE, A FRONT EXTENDING FROM THE NORTHERN PLAINS TO THE
CENTRAL HIGH PLAINS INTO THE GREAT BASIN WILL MOVE EASTWARD TO THE
UPPER GREAT LAKES/MIDDLE MISSISSIPPI VALLEY TO THE SOUTHERN HIGH
PLAINS INTO THE SOUTHWEST BY TUESDAY EVENING.  THE STORM WILL
PRODUCE RAIN AND SNOW OVER PARTS OF THE NORTHERN PLAINS INTO THE
UPPER GREAT LAKES THAT WILL MOVE INTO PARTS OF UPPER/MIDDLE
MISSISSIPPI VALLEY AND NORTHERN PLAINS BY MONDAY EVENING.  AS THE
SYSTEM MOVES EASTWARD, MOISTURE WILL MOVE NORTHWARD FROM THE
WESTERN GULF OF MEXICO AND POOL ALONG THE BOUNDARY.  OVERNIGHT
MONDAY, THE RAIN AND SNOW WILL CHANGE OVER TO ALL RAIN OVER PARTS
OF THE UPPER MISSISSIPPI VALLEY/UPPER GREAT LAKES THROUGH TUESDAY.
 IN ADDITION, SHOWERS AND THUNDERSTORM WILL START TO DEVELOP NEAR
THE FRONT OVER THE MIDDLE MISSOURI VALLEY OVERNIGHT MONDAY
EXPANDING INTO THE CENTRAL PLAINS BY TUESDAY MORNING AND CONTINUE
TO EXPAND INTO THE CENTRAL HIGH PLAINS AND PARTS OF THE SOUTHERN
ROCKIES BY TUESDAY EVENING.

IN THE MEANTIME, UPPER-LEVEL ENERGY WILL MOVE ONSHORE OVER THE
PACIFIC NORTHWEST AND MOVE SOUTHEASTWARD TO THE CENTRAL/SOUTHERN
HIGH PLAINS AND THE CENTRAL/SOUTHERN PLAINS BY TUESDAY EVENING.
SOME MOISTURE WILL ACCOMPANY THE ENERGY ONSHORE OVER PARTS OF THE
NORTHWEST INTO NORTHERN/CENTRAL CALIFORNIA ON MONDAY INTO MONDAY
EVENING.  RAIN AND HIGHEST ELEVATION SNOW WILL DEVELOP OVER PARTS
PACIFIC NORTHWEST INTO NORTHERN CALIFORNIA THROUGH TUESDAY
MORNING.  SNOW AND LOWER ELEVATION RAIN WILL DEVELOP OVER PARTS OF
THE NORTHERN ROCKIES ON MONDAY MORNING THAT WILL EXPAND INTO PARTS
OF THE CENTRAL ROCKIES/GREAT BASIN BY MONDAY EVENING AND CONTINUE
OVER THE AREA THROUGH TUESDAY EVENING.  ADDITIONAL UPPER-LEVEL
ENERGY WILL MOVE ONSHORE OVER THE PACIFIC NORTHWEST ON TUESDAY
INTO TUESDAY EVENING.  THE ENERGY WILL AID IN PRODUCING RAIN OVER
PARTS OF THE PACIFIC NORTHWEST COAST BY TUESDAY AFTERNOON AND
EXPAND INLAND BY TUESDAY EVENING.


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.