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FXUS01 KWBC 130748
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
348 AM EDT SUN SEP 13 2009
VALID 12Z SUN SEP 13 2009 - 00Z TUE SEP 15 2009
MORE WET WEATHER IS IN STORE FOR PARTS OF THE SOUTHERN PLAINS AS
AN UPPER LEVEL DISTURBANCE ACROSS TX DRIFTS EVER SO SLOWLY
EASTWARD OVER THE NEXT COUPLE DAYS. THIS SLOW MOVEMENT COUPLED
WITH ABUNDANT GULF MOISTURE WILL LEAD TO WIDESPREAD RAIN AND
THUNDERSTORMS..HEAVY AT TIMES ACROSS THE SOUTHERN PLAINS AND LOWER
MISSISSIPPI VALLEY THROUGH MONDAY. A WEAK FRONTAL BOUNDARY
EXTENDING EASTWARD ALONG THE GULF COAST WILL ALSO TEND TO AID THE
DEVELOPMENT OF SHOWERS AND THUNDERSTORMS EASTWARD ALONG THE GULF
COAST INTO FL.
TO THE NORTH...A WEAK COLD FRONT WILL SWEEP SOUTHEASTWARD ACROSS
THE GT LAKES AND NORTHEAST..ACCOMPANIED BY A FEW SHOWERS THRU
SUNDAY NIGHT. HIGH PRESSURE WILL BUILD ACROSS MUCH OF THE MIDWEST
AND GT LAKES PROVIDING FAIR AND DRY CONDITIONS INTO MONDAY. BY
LATE MONDAY..A REINFORCING COLD FRONT WILL PRODUCE A FEW SHOWERS
INTO PARTS OF THE NORTHEAST AS IT DROPS SOUTHEASTWARD OUT OF
EASTERN CANADA.
AN UPPER LOW WILL LIFT NORTHWARD ACROSS WY AND MT INTO CANADA
AROUND THE WEST SIDE OF A SOUTHERN CANADIAN UPPER RIDGE. THIS
SYSTEM IS EXPECTED TO TRIGGER A FEW SHOWERS MAINLY ON SUNDAY
THROUGH PARTS OF THE NORTHERN PLAINS BEFORE LIFTING INTO CANADA.
FARTHER WEST...AN UPPER LEVEL TROF IS EXPECTED TO PUSH INLAND ACRS
THE CENTRAL PACIFIC COAST REGION SUNDAY NIGHT INTO MONDAY. A BAND
OF SHOWERS IS EXPECTED TO ACCOMPANY THE ASSOCIATED COLD FRONT AS
IT WEAKENS INTO THE THE CA/OR COASTAL REGION SUNDAY NIGHT. AS THE
UPPER TROF MAKES ITS WAY INTO THE GT BASIN ON MON..ASSOCIATED COLD
POOL ALOFT SHOULD HELP PAVE THE WAY FOR MORE WIDESPREAD AFTERNOON
SHOWER/THUNDERSTORM ACTIVITY ACROSS THE GREAT BASIN EASTWARD INTO
PARTS OF THE CENTRAL AND SOUTHERN ROCKIES.
SULLIVAN
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
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