121
FXUS01 KWBC 301925
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
325 PM EDT WED SEP 30 2009
VALID 00Z THU OCT 01 2009 - 12Z FRI OCT 02 2009
A STRONG STORM OVER THE CENTRAL ROCKIES WILL MOVE TO THE GREAT
LAKES BY FRIDAY. THE STORM WILL PRODUCE SNOW BEHIND THE FRONT
OVER THE NORTHERN/CENTRAL ROCKIES AND NORTHERN INTERMOUNTAIN
REGION THROUGH THURSDAY MORNING. RAIN WILL DEVELOP OVER THE
NORTHERN PLAINS AND WILL SPREAD EASTWARD INTO THE GREAT LAKES BY
FRIDAY. AS THE SYSTEM MOVES OUT OF THE ROCKIES ... SHOWERS AND
THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE FRONT FROM THE
SOUTHERN PLAINS NORTHWARD TO THE CENTRAL PLAINS AND WILL MOVE
EASTWARD TO OHIO VALLEY AND EXTEND TO THE CENTRAL GULF COAST BY
FRIDAY. SOME OF THE THUNDERSTORMS ASSOCIATED WITH THIS SYSTEM MAY
BECOME SEVERE. BEHIND THE FRONT ... TEMPERATURES WILL BE BELOW TO
MUCH BELOW AVERAGE THE UPPER MIDWEST.
MEANWHILE ... AN OLD FRONT OVER THE SOUTHERN TIP OF FLORIDA WILL
AID IN TRIGGERING SHOWERS AND THUNDERSTORMS OVER THE REGION
THROUGH FRIDAY. IN ADDITION ... AN UPPER LEVEL LOW OVER THE
NORTHEAST WILL AID IN PRODUCING SCATTERED RAIN SHOWERS OVER PARTS
OF THE NORTHEAST THROUGH FRIDAY.
ELSEWHERE ... AN APPROACHING PACIFIC STORM WILL MOVE ONSHORE AND
ADVANCE INLAND TO THE NORTHERN INTERMOUNTAIN REGION. MOIST FLOW
OFF THE PACIFIC ... AHEAD OF THE SYSTEM ... WILL PRODUCE SCATTERED
LIGHT RAIN OVER PARTS OF THE NORTHWEST COAST THROUGH THURSDAY
MORNING. WHEN THE FRONT COMES ONSHORE ... LIGHT RAIN WILL
CONTINUE OVER PARTS OF THE NORTHWEST.
ZIEGENFELDER
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page