163
FXUS01 KWBC 070835
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
434 AM EDT SUN SEP 07 2008
VALID 12Z SUN SEP 07 2008 - 00Z TUE SEP 09 2008
NEAR NEW ENGLAND... TROPICAL STORM HANNA WILL BECOME EXTRATROPICAL
EARLY THIS MORNING AS IT MERGES WITH A COLD FRONT TO ITS IMMEDIATE
WEST. SIGNIFICANT RAIN ASSOCIATED WITH THE STORM WILL MOVE
COMPLETELY OUT OF MAINE BY MIDDAY AS THE LOW CENTER QUICKLY TRACKS
AWAY FROM THE U.S. PUSHING A COLD FRONT OUT OVER THE ATLANTIC.
THIS WILL USHER IN A LESS HUMID AIRMASS INTO THE MID ATLANTIC AND
NORTHEAST FOR TODAY AND MONDAY. SKIES WILL BE PARTLY CLOUDY WITH
HIGH TEMPERATURES RANGING FROM THE 70S OVER NEW ENGLAND AND INTO
THE 80S OVER THE MID ATLANTIC FOR TODAY AND MONDAY.
ONGOING CONVECTION THIS MORNING OVER SOUTHERN KANSAS AND NORTHERN
OKLAHOMA SHOULD DIMINISH THIS MORNING... LEAVING BEHIND MOSTLY
CLOUDY SKIES AND COOL TEMPERATURES TO THE NORTH OF AN EAST-WEST
ORIENTED STATIONARY FRONT OVER THE SOUTHERN PLAINS. WIDESPREAD
RAIN WITH EMBEDDED THUNDERSTORMS SHOULD BREAK OUT OVER THE CENTRAL
PLAINS TONIGHT AS UPPER LEVEL ENERGY MOVES INTO THE REGION...AND
INTERACTS WITH THE THERMAL GRADIENT. A WAVE OF LOW PRESSURE IS
FORECAST TO DEVELOP ALONG THE FRONT OVER THE CENTRAL U.S. AND
TRACK NORTHEASTWARD LATE MONDAY INTO TUESDAY... AS THE WESTERN END
OF THE FRONT SAGS SOUTH THROUGH THE CENTRAL PLAINS AND EVENTUALLY
INTO TEXAS AND NEW MEXICO BY TUESDAY MORNING. TEMPERATURES FROM
THE CENTRAL PLAINS... NORTHWARD... WILL REMAIN BELOW AVERAGE TODAY
AND MONDAY... HOWEVER TEMPERATURES SHOULD WARM BY MID WEEK AS THE
BOARD UPPER TROUGH WHICH HAS BEEN LOCATED OVER THE NORTHERN U.S.
BEGINS TO SHIFT TO THE EAST.
ABOVE AVERAGE HEAT OVER PORTIONS OF THE WEST IS FORECAST TO
SUBSIDE AS WE HEAD INTO THE EARLY PART OF THIS WEEK DUE TO A
BREAKDOWN IN UPPER LEVEL RIDGING OVER THE REGION. WITH THE
EXCEPTION OF EVENING THUNDERSTORMS OVER THE CENTRAL AND SOUTHERN
ROCKIES... THE WEST IS FORECAST TO REMAIN MOSTLY DRY THROUGH
TUESDAY.
OTTO
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