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FXUS01 KWBC 031946
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
345 PM EDT SAT OCT 03 2009
VALID 00Z SUN OCT 04 2009 - 12Z MON OCT 05 2009
A DEEP STORM OVER THE GREAT LAKES WILL SLOWLY MOVE TO THE
NORTHEAST INTO SOUTHEASTERN CANADA. COLD AIR ALOFT IN ASSOCIATED
WITH UPPER LEVEL ENERGY WILL TRIGGER SCATTERED RAIN SHOWERS OVER
THE REGION THROUGH MONDAY. RAIN AND EMBEDDED THUNDERSTORMS WILL
DEVELOP ALONG AND AHEAD OF THE ASSOCIATED FRONT OVER NEW ENGLAND
CONTINUING THROUGH TO SUNDAY EVENING. THE TRAILING FRONT WILL
SETUP NEAR THE GULF COAST AND MOISTURE FROM THE GULF WILL OVERRUN
THE BOUNDARY PRODUCING SHOWERS AND THUNDERSTORMS OVER THE WESTERN
GULF COAST. A WAVE OF LOW PRESSURE WILL MOVE EASTWARD ALONG THE
FRONT BRINING THE SHOWERS AND THUNDERSTORMS TO THE EAST OVER THE
CENTRAL AND EASTERN GULF COAST BY MONDAY.
ANOTHER STRONG STORM OVER THE PACIFIC NORTHWEST WILL SLOWLY MOVE
SOUTHEASTWARD TO THE CENTRAL ROCKIES BY MONDAY. THE SYSTEM WILL
BEGIN TO ENTRAIN MOISTURE FROM THE GULF OF MEXICO AS THE STORM
MOVES EASTWARD. THEREFORE ... A RELATIVELY SMALL AREA OF RAIN AND
HIGHER ELEVATION SNOW OVER THE NORTHERN INTERMOUNTAIN REGION/GREAT
BASIN WILL BLOSSOM INTO A MUCH LARGER AREA OF HIGHER ELEVATION
SNOW AND RAIN OVER THE NORTHERN/CENTRAL ROCKIES AND RAIN OVER THE
NORTHERN/CENTRAL PLAINS.
ELSEWHERE ... MOISTURE ASSOCIATED WITH TROPICAL DEPRESSION OLAF
WILL MAKE ITS WAY INTO THE SOUTHWEST AND SOUTHERN ROCKIES AIDING
IN THE DEVELOPMENT OF SCATTERED SHOWERS AND THUNDERSTORMS THROUGH
MONDAY.
ZIEGENFELDER
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
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