Prognostic Meteorological Discussion
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FXUS01 KWBC 020749
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
349 AM EDT TUE SEP 2 2014

VALID 12Z TUE SEP 2 2014 - 12Z THU SEP 4 2014

***SCATTERED SHOWERS AND STORMS FROM THE CENTRAL PLAINS TO THE
MID-ATLANTIC***

***HOT AND HUMID FOR THE SOUTHERN AND EASTERN U.S.***

***DRIER AND COOLER FOR THE WESTERN U.S. THROUGH MIDWEEK***

A COUPLE OF FRONTAL BOUNDARIES ARE FORECAST TO AFFECT THE NORTHERN
TIER OF THE U.S. THROUGH THE MIDDLE OF THE WORK WEEK.  THE SYSTEM
THAT IS EXPECTED TO BRING THE GREATEST IMPACT WILL BE THE FRONT
CURRENTLY MOVING THROUGH THE GREAT LAKES AND OHIO VALLEY, AND
EVENTUALLY TO THE EAST COAST BY WEDNESDAY MORNING.  MULTIPLE
THUNDERSTORM COMPLEXES ARE EXPECTED TO DEVELOP IN THE VICINITY OF
THIS FRONTAL BOUNDARY AS IT MOVES EAST, AND A FEW SEVERE STORMS
WILL BE POSSIBLE AS IT INTERACTS WITH A HOT AND HUMID AIR MASS
WITH WIND SHEAR ALOFT.  ANOTHER COLD FRONT TOWARDS THE END OF THE
WORK WEEK COULD SET OFF MORE STORMS FOR THE PLAINS.

STRONG UPPER LEVEL RIDGING OVER THE SOUTHERN AND EASTERN PART OF
THE U.S. WILL HELP KEEP TEMPERATURES FEELING MORE LIKE JULY FOR
THE FIRST FEW DAYS OF SEPTEMBER.  WIDESPREAD HIGHS IN THE 90S ARE
LIKELY FROM TEXAS TO THE MID-ATLANTIC ON TUESDAY AND WEDNESDAY,
AND TRIPLE DIGIT TEMPERATURES ARE FORECAST FOR THE LOWER
ELEVATIONS OF THE DESERT SOUTHWEST.  HEAT INDICES COULD EASILY
REACH 100 DEGREES OR HIGHER DURING THE AFTERNOON HOURS OVER THE
SOUTHERN U.S.

OUT WEST, COOLER TEMPERATURES AND HIGH PRESSURE WILL BE ENJOYED
THROUGH THE MIDDLE OF THE WEEK.  THE VAST MAJORITY OF LOCATIONS
WEST OF THE CONTINENTAL DIVIDE SHOULD REMAIN DRY.  A FEW ISOLATED
SHOWERS OR STORMS CANNOT BE RULED OUT, AS PIECES OF WEAK SHORTWAVE
ENERGY IN THE FLOW ALOFT MOVE THROUGH THE NORTHERN ROCKIES AND THE
HIGHER TERRAIN OF THE PACIFIC NORTHWEST.  IT APPEARS THAT THE
MOISTURE ASSOCIATED WITH THE MONSOON IS NOW SOUTH OF THE BORDER IN
MEXICO.

HAMRICK


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