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FXUS01 KWBC 041945
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
345 PM EDT SUN OCT 04 2009
VALID 00Z MON OCT 05 2009 - 12Z TUE OCT 06 2009
A STRONG STORM OVER THE CENTRAL ROCKIES WILL MOVE EASTWARD TO THE
MIDDLE MISSOURI VALLEY BY TUESDAY. THE SYSTEM WILL PRODUCE SNOW
AND LOWER ELEVATION RAIN WITH IN PLACES EMBEDDED THUNDERSTORMS
OVER PARTS OF THE GREAT BASIN/NORTHERN/CENTRAL ROCKIES AND PARTS
OF THE NORTHERN HIGH PLAINS THROUGH MONDAY NIGHT. RAIN WILL
DEVELOP OVER PARTS OF THE NORTHERN/CENTRAL PLAINS ALSO THROUGH
MONDAY NIGHT AS SHOWERS AND THUNDERSTORMS DEVELOP OVER THE
SOUTHERN PLAINS. BY TUESDAY RAIN WILL BE OVER THE UPPER MIDWEST
AND SHOWERS AND THUNDERSTORMS WILL EXTEND FROM THE MIDDLE
MISSISSIPPI VALLEY TO PARTS OF THE SOUTHERN PLAINS. TEMPERATURES
WILL BE MUCH BELOW AVERAGE OVER PARTS OF THE NORTHERN ROCKIES AND
NORTHERN PLAINS.
A WAVE OF LOW PRESSURE WILL MOVE EASTWARD ALONG A STATIONARY FRONT
OVER THE GULF COAST. AS THE STORM MOVES ... EAST MOISTURE RICH
AIR FROM THE GULF OF MEXICO WILL OVERRUN THE FRONT PRODUCING
SHOWERS AND THUNDERSTORMS FROM THE WESTERN GULF COAST TO THE
SOUTHEAST AND ACROSS THE THE TENNESSEE VALLEY. THE RAIN AND
CLOUDS WILL HELP TO KEEP TEMPERATURES BELOW AVERAGE OVER THE
SOUTHEAST AND INTERIOR GULF COAST.
NEXT ... AN UPPER LEVEL LOW OVER THE GREAT LAKES WILL SWING INTO
SOUTHEASTERN CANADA BY LATE MONDAY. THE INSTABILITY RAIN SHOWERS
OVER THE REGION WILL COME TO AND END FROM WEST TO EAST BY TUESDAY
AFTERNOON FOR THE GREAT LAKES AND THE NORTHEAST.
ZIEGENFELDER
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
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