403
FXUS01 KWBC 102000
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
400 PM EDT SAT OCT 10 2009
VALID 00Z SUN OCT 11 2009 - 12Z MON OCT 12 2009
A COLD DOME OF HIGH PRESSURE WILL BUILD OVER THE PLAINS AND MOVE
EASTWARD TO THE NORTHEAST BY MONDAY MORNING. WELL BELOW AVERAGE
TEMPERATURES WILL BE ASSOCIATED WITH THE COLD AIR OVER THE
NORTHERN ROCKIES AND THE NORTHERN/CENTRAL PLAINS. BELOW AVERAGE
TEMPERATURES WILL EXTEND FROM THE GREAT LAKES TO THE SOUTHERN
PLAINS AND WILL MOVE INTO THE NORTHEAST AND THE MID-ATLANTIC BY
MONDAY. ALONG THE LEADING EDGE OF THE COLD AIR A COLD FRONT WILL
EXTEND FROM THE GREAT LAKES SOUTHWESTWARD TO THE SOUTHERN PLAINS.
THIS BOUNDARY WILL MOVE EASTWARD TO OFF THE EAST COAST BY SUNDAY
EVENING. THE SYSTEM WILL PRODUCE SCATTERED SNOW AND RAIN SHOWERS
OVER PARTS OF THE UPPER GREAT LAKES INTO PARTS OF EXTREME NORTHERN
NEW ENGLAND ON SUNDAY.
THE WESTERN END OF THE FRONT WILL BE BANKED UP AGAINST THE ROCKIES
.. WITH THE CLOCKWISE FLOW AROUND THE HIGH PRESSURE
UPPER
LEVEL ENERGY COME OUT OF THE NORTHWEST ... AND ACCESS TO GULF
MOISTURE ... SNOW AND SNOW SHOWERS WILL DEVELOP OVER PARTS OF THE
NORTHERN/CENTRAL ROCKIES THAT WILL EXPAND EASTWARD INTO THE
NORTHERN PLAINS AND PARTS OF THE UPPER MIDWEST. A TRANSITION ZONE
OF FREEZING RAIN AND SLEET WILL DEVELOP OVER PORTIONS OF THE
CENTRAL HIGH PLAINS THROUGH MONDAY MORNING. SOUTH OF THIS REGION
RAIN WILL DEVELOP OVER PARTS OF THE SOUTHERN HIGH PLAINS THROUGH
SUNDAY MORNING. RAIN WILL ALSO DEVELOP OVER PARTS OF THE CENTRAL
PLAINS TO THE WESTERN OHIO VALLEY BY MONDAY.
AN OLD BOUNDARY OVER THE SOUTHEAST STRETCHING TO THE GULF COAST
WILL MOVE NORTHWARD AS A WARM FRONT OVER THE GULF COAST SATES BY
MONDAY. MOISTURE WILL FLOW NORTHWARD OUT OF THE GULF OF MEXICO
OVERRUNNING THE FRONT PRODUCING SHOWERS AND THUNDERSTORMS OVER THE
GULF COAST EASTWARD TO THE SOUTHEAST AND PARTS OF THE CAROLINAS
THROUGH MONDAY.
ZIEGENFELDER
GRAPHIC AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
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