Prognostic Meteorological Discussion
Issued by NWS

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4

000
FXUS01 KWBC 031937
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
336 PM EDT THU SEP 03 2015

VALID 00Z FRI SEP 04 2015 - 00Z SUN SEP 06 2015

...SEVERE THUNDERSTORMS POSSIBLE ON FRIDAY ACROSS PORTIONS OF THE
NORTHERN PLAINS AND UPPER MIDWEST...

...ABOVE AVERAGE TEMPERATURES EXPECTED FOR THE EASTERN TWO-THIRDS
OF THE U.S. THROUGH SATURDAY...

A COLD FRONT WILL EXTEND FROM THE NORTHERN PLAINS INTO THE
NORTHERN INTERMOUNTAIN WEST BY THIS EVENING BEFORE BECOMING NEARLY
STATIONARY TONIGHT -- ALLOWING SEVERAL WAVES OF LOW PRESSURE TO
MOVE ALONG THE FRONT THROUGH SATURDAY. THIS FRONT WILL RESULT IN
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS TONIGHT FROM THE
NORTHERN INTERMOUNTAIN WEST EASTWARD INTO THE NORTHERN PLAINS. ON
FRIDAY, THE FRONT WILL BRING SCATTERED TO NUMEROUS SHOWERS AND
THUNDERSTORMS FROM THE NORTHERN PLAINS TO PORTIONS OF THE UPPER
MIDWEST. SOME OF THESE THUNDERSTORMS IN THE NORTHERN PLAINS/UPPER
MIDWEST MAY BECOME SEVERE -- AS HIGHLIGHTED BY A SLIGHT RISK OF
SEVERE THUNDERSTORMS IN THE DAY 2 CONVECTIVE OUTLOOK FROM THE
STORM PREDICTION CENTER. ADDITIONAL SHOWERS AND THUNDERSTORMS WILL
CONTINUE ON FRIDAY FARTHER WEST, ACROSS MUCH OF THE NORTHERN
INTERMOUNTAIN WEST, AS THE FRONTAL BOUNDARY REMAINS NEARLY
STATIONARY ACROSS THE REGION. THE FRONTAL BOUNDARY WILL MOVE
LITTLE ON SATURDAY, WITH SHOWERS AND THUNDERSTORMS IN THE FORECAST
ONCE AGAIN FROM MUCH OF THE NORTHERN INTERMOUNTAIN WEST EASTWARD
TO THE UPPER MIDWEST.

ACROSS THE SOUTHWESTERN U.S., MONSOONAL MOISTURE WILL KEEP
SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS IN PLACE
ACROSS THE FOUR CORNERS REGION THROUGH SATURDAY. SHOWERS AND
THUNDERSTORMS SHOULD BE THE MOST NUMEROUS IN AREAS OF TERRAIN.

A WEAK COLD FRONT WILL MOVE SOUTHWARD ACROSS THE MID-ATLANTIC
STATES AND GREAT LAKES THIS EVENING, BRINGING SCATTERED SHOWERS
AND THUNDERSTORMS. THIS FRONT WILL CONTINUE TO BRING SCATTERED
SHOWERS AND STORMS TO THE MID-ATLANTIC ON FRIDAY BEFORE THE FRONT
DISSIPATES ON SATURDAY. NORTH OF THIS FRONT, A DRIER AND MORE
COMFORTABLE AIR MASS WILL MOVE INTO MUCH OF THE NORTHEAST AND
MID-ATLANTIC REGIONS.

FINALLY, ABOVE AVERAGE TEMPERATURES WILL REMAIN PREDOMINANT ACROSS
THE EASTERN TWO-THIRDS OF THE COUNTRY, AS HIGH PRESSURE AT THE MID
AND UPPER-LEVELS OF THE ATMOSPHERE REMAINS IN PLACE. AFTERNOON
HIGH TEMPERATURES WILL BE 5 TO 10 DEGREES ABOVE AVERAGE OVER MOST
OF THE EASTERN TWO-THIRDS OF THE COUNTRY. ACROSS PORTIONS OF THE
MIDWEST, TEMPERATURES MAY RISE TO 10 TO 15 DEGREES ABOVE AVERAGE.
THE MID-ATLANTIC MAY SEE SOME COOLER TEMPERATURES BY SATURDAY AS
AIR ORIGINATING OVER THE COOL WATERS OF THE ATLANTIC MOVES INTO
THE REGION BEHIND THE COLD FRONT. TEMPERATURES ON SATURDAY ACROSS
THE MID-ATLANTIC MAY BE 5 DEGREES BELOW AVERAGE.


RYAN


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
$$




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