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FXUS01 KWBC 200710
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
309 AM EDT SAT SEP 20 2008
VALID 12Z SAT SEP 20 2008 - 00Z MON SEP 22 2008
AN UPPER TROUGH WILL ANCHOR ACROSS THE NORTHWESTERN STATES WITH
COOLER AND DAMP CONDITIONS DURING THE NEXT FEW DAYS. RAIN WILL BE
MOST LIKELY OVER THE INTERIOR NORTHWEST FROM IDAHO TO WESTERN
MONTANA. A FRONTAL BOUNDARY WILL SLOWLY PUSH EASTWARD AND REACH
INTO THE NORTHERN HIGH PLAINS BY MONDAY. SCATTERED SHOWERS AND
THUNDERSTORMS SHOULD PRECEDE THIS FRONT SOUTHWARD INTO THE CENTRAL
ROCKIES. THE SOUTHWESTERN STATES WILL REMAIN DRY AS THE UPPER
ENERGY AND THERMAL BOUNDARY REMAIN NORTH OF THIS REGION.
A WARM SOUTHERLY FLOW WILL RESULT IN ABOVE NORMAL TEMPERATURES
ACROSS MUCH OF THE PLAINS. THE CHANCE OF SHOWERS WILL INCREASE BY
MONDAY ESPECIALLY OVER THE NORTHERN PLAINS AS ENERGY FROM THE
NORTHWEST PROGRESSES INTO THE DAKOTAS. A WEAK TROUGH OVER THE
MIDDLE AND LOWER MISSISSIPPI VALLEY WILL RESULT IN MORE SHOWERS
THROUGH SUNDAY BEFORE DRIER CONDITIONS DEVELOP BY MONDAY.
A COLD FRONT WILL CROSS THE GREAT LAKES REGION TODAY AND REACH
THROUGH THE NORTHEAST BY MONDAY...AS ANOTHER STRONG CANADIAN HIGH
PRESSURE SYSTEM SETTLES INTO THE REGION. A FEW SHOWERS WILL
ACCOMPANY THIS FRONT ACROSS NEW YORK AND NEW ENGLAND. A NEARLY
STATIONARY BOUNDARY OFF THE SOUTHEAST U.S. COAST AND ACROSS
FLORIDA WILL CONTINUE TO BE A FOCUS FOR SHOWERS AND CONVECTION
DURING THE NEXT FEW DAYS.
HEDGE
GRAPHICS AVAILABLE AT WWW.HPC.NCEP.NOAA.GOV
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