575
FXUS01 KWBC 120737
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
336 AM EDT MON OCT 12 2009
VALID 12Z MON OCT 12 2009 - 00Z WED OCT 14 2009
ANOTHER STRONG SURGE OF HIGH PRESSURE IS EXPECTED TO SWOOP DOWN
FROM CANADA INTO THE NORTHERN PLAINS MONDAY EVENING...KEEPING
TEMPERATURES IN THE AREA WELL BELOW NORMAL. THIS AREA OF HIGH
PRESSURE WILL BE MAINLY STATIONARY OVER THE MIDWEST...OHIO
VALLEY...MIDDLE ATLANTIC...AND NEW ENGLAND STATES. THE STATIONARY
FRONT DRAPED ACROSS THE SOUTHERN U.S. WILL KEEP THE CHILLY
TEMPERATURES FROM REACHING THE SOUTHEASTERN STATES.
THIS SOUTHERN STATIONARY BOUNDARY WILL CONNECT WITH THE FRONT
DRAPED ALONG THE ROCKY MOUNTAINS BY MID-DAY TUESDAY. PRECIPITATION
IS EXPECTED ALONG THE FRONT...WITH HEAVIEST AMOUNTS FALLING IN
AREAS OF HIGH TERRAIN AND ALSO NEAR THE LOW PRESSURE CENTERS.
AREAS IN THE ROCKIES THAT RECEIVED SNOW OVER LAST WEEKEND WILL
LIKELY SEE MORE SNOW SHOWERS THROUGH MID-WEEK...WITH HEAVIER
ACCUMULATIONS IN THE HIGHER TERRAIN.
A RAPIDLY DEEPENING LOW OVER THE PACIFIC IS GOING TO BRING HEAVY
RAIN AND SNOW TO THE WEST COAST. LIGHT PRECIPITATION WILL BEGIN TO
FALL LATE MONDAY EVENING AND WILL INTENSIFY AS THE STORM SYSTEM
MOVES CLOSER TO THE COAST ON TUESDAY. THE SYSTEM WILL BE PUSHING
AMPLE MOISTURE AHEAD OF THE FRONT TO CAUSE FLOODING.
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