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FXUS01 KWBC 030720
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
220 AM EST TUE NOV 03 2009
VALID 12Z TUE NOV 03 2009 - 00Z THU NOV 05 2009
RELATIVELY WEAK WAVES OF ENERGY IN NORTHWEST FLOW ALOFT WILL
CONTINUE OVER THE LOWER 48 THROUGH WEDNESDAY... PROLONGING THE
QUIET WEATHER OF RECENT. ONE UPPER LEVEL SYSTEM OVER ONTARIO THIS
MORNING WILL DRIVE A WEAKENING COLD FRONT INTO THE NORTHEAST AND
MID ATLANTIC TODAY ALONG WITH LIGHT SCATTERED RAIN UP NORTH AND
PERHAPS A SNOW SHOWER NEAR THE GREAT LAKES. A SECOND UPPER LEVEL
SYSTEM WILL DRIVE ANOTHER COLD FRONT INTO THE GREAT PLAINS TODAY
WITH LIGHT RAIN AFFECTING THE LOWER MISSISSIPPI VALLEY WITH LIGHT
SNOW JUST NORTH INTO CANADA. THIS FRONTAL SYSTEM WILL WEAKEN ON
WEDNESDAY AS IT REACHES THE OHIO VALLEY WITH REDEVELOPMENT
EXPECTED OVER THE WESTERN ATLANTIC WEDNESDAY NIGHT.
TEMPERATURES ARE EXPECTED TO TREND COOLER EACH DAY ACROSS THE
NORTHEASTERN QUADRANT OF THE LOWER 48 DUE TO THE SUCCESSIVE SURGES
OF COLDER AIR. ON THE CONTRARY OUT WEST... AS UPPER LEVEL RIDGING
BUILDS IN ADVANCE OF A DEEPENING UPPER LEVEL TROF OVER THE
PACIFIC... ABOVE AVERAGE TEMPERATURES WILL SPREAD NORTHEAST FROM
THE SOUTHWESTERN U.S. WITH A RATHER WARM NOVEMBER DAY EXPECTED
ACROSS THE NORTHERN HIGH PLAINS ON THURSDAY. LATE IN THE SHORT
RANGE PERIOD... WEDNESDAY NIGHT... A COLD FRONT WILL APPROACH THE
PACIFIC NORTHWEST WITH RAIN LIKELY ALONG THE COASTS BY THURSDAY
MORNING.
THE GREATEST POTENTIAL FOR PERHAPS MODERATE RAINFALL WILL BE IN
THE VICINITY OF THE WESTERN PORTION OF A STALLED COLD FRONT OVER
SOUTHERN FLORIDA THROUGH MID WEEK. THE SOUTHERN HALF OF THE
FLORIDA PENINSULA WILL SEE A CONTINUED THREAT OF SHOWERS AND MAYBE
A THUNDERSTORM THROUGH WEDNESDAY.
OTTO
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