Prognostic Meteorological Discussion
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FXUS01 KWBC 252140
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
539 PM EDT MON MAY 25 2015

VALID 00Z TUE MAY 26 2015 - 00Z THU MAY 28 2015

***STORMY WEATHER AND FLOODING OVER THE SOUTHERN PLAINS***

***SCATTERED SHOWERS AND THUNDERSTORMS OVER THE WESTERN U.S.***

***WARM AND HUMID ACROSS MUCH OF THE EASTERN U.S.***

ANOTHER ROUND OF BAD WEATHER IS AFFECTING CENTRAL AND EASTERN
TEXAS, AND EASTERN OKLAHOMA MONDAY EVENING AS ANOTHER SURGE OF
MOISTURE FROM THE GULF OF MEXICO INTERACTS WITH A POTENT SHORTWAVE
ALOFT.  HEAVY RAIN WILL ONCE AGAIN BE A CONCERN OVER AREAS THAT
RECEIVED EXCESSIVE RAINFALL OVER THE WEEKEND, AND THIS COULD LEAD
TO FLASH FLOODING ISSUES.  SEVERE THUNDERSTORMS ARE ALSO EXPECTED
FROM TEXAS TO THE MIDWEST STATES AS THIS DISTURBANCE LIFTS TO THE
NORTHEAST ON TUESDAY ACROSS THE MISSISSIPPI RIVER VALLEY AND
TOWARDS THE GREAT LAKES REGION.  AN ADDITIONAL AREA OF HEAVY RAIN
AND STORMS IS LIKELY ACROSS THE DEEP SOUTH.

OVER THE WESTERN THIRD OF THE U.S., MAINLY DIURNALLY DRIVEN
SHOWERS AND THUNDERSTORMS CAN BE EXPECTED EACH AFTERNOON AND
EVENING FROM THE SIERRA NEVADA MOUNTAINS TO THE FRONT RANGE OF THE
ROCKY MOUNTAINS.  INSTABILITY FROM A BROAD UPPER LEVEL TROUGH OVER
THE REGION WILL PROMOTE THE DEVELOPMENT OF THIS CONVECTION, AND
THE GREATEST COVERAGE IS EXPECTED FROM UTAH TO WESTERN MONTANA.

THE BERMUDA HIGH OFF THE EAST COAST IS ALLOWING FOR BUILDING HEAT
AND HUMIDITY ACROSS MUCH OF THE EASTERN U.S. THIS WEEK.  SUSTAINED
SOUTHERLY FLOW AND RIDGING ALOFT WILL RESULT IN WIDESPREAD HIGHS
IN THE 80S TO LOWER 90S ALONG WITH DEWPOINTS WELL INTO THE 60S TO
AROUND 70 DEGREES, WHICH IS MORE TYPICAL OF LATE JUNE.  RAIN
CHANCES RETURN BY TUESDAY AND WEDNESDAY AS THE DISTURBANCE
CURRENTLY TO THE WEST BEGINS AFFECTING THE REGION.  HOWEVER, THE
STRENGTH AND SEVERITY WILL BE SIGNIFICANTLY LESS THAN WHAT IS
HAPPENING OVER THE PLAINS GIVEN THE STRONG RIDGE OFF THE COAST.

HAMRICK


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