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
000
FXUS01 KWBC 231958
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
357 PM EDT TUE MAY 23 2017

VALID 00Z WED MAY 24 2017 - 00Z FRI MAY 26 2017

...SEVERE WEATHER IS POSSIBLE WEDNESDAY ACROSS PORTIONS OF THE
SOUTHEAST...

...HEAVY RAINFALL EXPECTED THE NEXT COUPLE OF DAYS ACROSS PORTIONS
OF THE APPALACHIANS AS WELL AS THE SOUTHEAST...

...BELOW NORMAL TEMPS WILL PERSIST ACROSS THE EASTERN U.S. THIS
WEEK...

AN UPPER LEVEL SYSTEM MOVING THROUGH THE OHIO VALLEY, THE
SOUTHEAST, AND LIFTING INTO THE MID-ATLANTIC AND THE NORTHEAST BY
THURSDAY WILL SPREAD SHOWERS AND THUNDERSTORMS ACROSS THESE
REGIONS WEDNESDAY AND THURSDAY. THE HEAVIEST RAINFALL IS EXPECTED
ACROSS FLORIDA ALONG A COLD FRONT PUSHING SOUTHWARD THROUGH THE
STATE. THERE IS ALSO A SLIGHT RISK FOR SEVERE THUNDERSTORMS ON
WEDNESDAY ACROSS PORTIONS OF THE SOUTHEAST, AS ADVERTISED BY THE
STORM PREDICTION CENTER. EXPECT ANOTHER AREA OF ORGANIZED RAINFALL
ACROSS THE APPALACHIANS WHERE FAVORABLE UPSLOPE FLOW ALONG THE
TERRAIN MAY PRODUCE HEAVIER RAINFALL, WITH LOCALIZED FLASH
FLOODING POSSIBLE. UNDERNEATH OF THIS UPPER LEVEL TROUGH, EXPECT
TEMPERATURES TO REMAIN BELOW NORMAL ACROSS THE EASTERN U.S., WITH
AFTERNOON VALUES AS MUCH AS 10 TO 20 DEGREES BELOW NORMAL.

MEANWHILE, A FRONT WILL USHER IN COOLER AIR ACROSS THE NORTHWEST
ON WEDNESDAY WITH ANY PRECIPITATION CONFINED TO THE HIGHER
ELEVATIONS OF THE PACIFIC NORTHWEST. BY WEDNESDAY AFTERNOON, AS
THE BOUNDARY PUSHES INTO THE ROCKIES AND THE GREAT BASIN, SHOWERS
AND THUNDERSTORMS MAY DEVELOP ALONG THE BOUNDARY FROM THE NORTHERN
PLAINS TO THE GREAT BASIN/INTERMOUNTAIN WEST. SHOWERS AND HIGHER
ELEVATION SNOW ARE ALSO POSSIBLE ON THURSDAY BEHIND THE FRONT
ACROSS PORTIONS OF THE NORTHERN AND CENTRAL ROCKIES.


SANTORELLI


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.