Prognostic Meteorological Discussion
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000
FXUS01 KWBC 040717
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
316 AM EDT WED MAY 04 2016

VALID 12Z WED MAY 04 2016 - 12Z FRI MAY 06 2016

...SEVERE THUNDERSTORMS AND HEAVY RAIN POSSIBLE TODAY FOR PORTIONS
OF SOUTH FLORIDA...

...COOL AND WET CONDITIONS TO PERSIST FOR MUCH OF THE EASTERN
U.S...

...ABOVE AVERAGE TEMPERATURES EXPECTED FROM THE INTERIOR NORTHWEST
TO THE NORTHERN PLAINS...

A LOW PRESSURE SYSTEM OFF THE MID-ATLANTIC COAST AND THE
ASSOCIATED COLD FRONT EXTENDING SOUTH TO FLORIDA WILL BRING RAIN
AND THUNDERSTORMS TO MUCH OF THE EAST COAST TODAY. SOME
THUNDERSTORMS MAY BE SEVERE ACROSS EASTERN PORTIONS OF SOUTH
FLORIDA, WHERE THE STORM PREDICTION CENTER IS FORECASTING A SLIGHT
RISK OF SEVERE THUNDERSTORMS. ADDITIONALLY, HEAVY RAINFALL AMOUNTS
OF 1 TO 2 INCHES ARE POSSIBLE ACROSS MUCH OF THE CENTRAL/SOUTHERN
FLORIDA PENINSULA. ANOTHER LOW PRESSURE SYSTEM WILL QUICKLY CROSS
THE GREAT LAKES TODAY, BRINGING SHOWERS AND THUNDERSTORMS TO THE
LOWER GREAT LAKES, OHIO VALLEY, AND CENTRAL APPALACHIANS. THIS
SYSTEM WILL REACH THE MID-ATLANTIC STATES WEDNESDAY NIGHT INTO
THURSDAY, WITH ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS FOR THAT
REGION. THIS AREA OF LOW PRESSURE IS FORECAST TO LINGER OFF
SOUTHERN MID-ATLANTIC COAST INTO FRIDAY, KEEPING RAIN IN THE
PICTURE FOR MUCH OF THE MID-ATLANTIC. THIS SECOND LOW PRESSURE
SYSTEM WILL ALSO BRING COOLER TEMPERATURES TO MUCH OF THE EASTERN
HALF OF THE COUNTRY, WITH TEMPERATURES 10 TO 20 DEGREES BELOW
AVERAGE FOR SOME AREAS TODAY AND THURSDAY.

HIGH PRESSURE ALOFT WILL KEEP ABOVE AVERAGE TEMPERATURES IN PLACE
TODAY FROM THE INTERIOR PACIFIC NORTHWEST TO THE NORTHERN PLAINS,
WHERE TEMPERATURES WILL BE 15 TO 25 DEGREES ABOVE AVERAGE. THESE
WARM TEMPERATURES WILL EXPAND EAST INTO PORTIONS OF THE UPPER
MIDWEST BY THURSDAY. A SLOW-MOVING FRONTAL BOUNDARY WILL GRADUALLY
MOVE INTO THE WESTERN U.S. THROUGH THE END OF THE WEEK. THE FRONT
WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS TO MUCH OF THE
CENTRAL/NORTHERN WEST COAST STATES TODAY, SPREADING INTO THE
INTERIOR WEST ON THURSDAY AND FRIDAY.

RYAN


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