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FXUS01 KWBC 281912
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
311 PM EDT WED OCT 28 2009
VALID 00Z THU OCT 29 2009 - 12Z FRI OCT 30 2009
HEAVY SNOW IN COLORADO...WYOMING...AND WESTERN NEBRASKA WILL
CONTINUE THROUGH LATE THURSDAY BEHIND A DYNAMIC FRONTAL SYSTEM
SPANNING THE LENGTH OF THE GREAT PLAINS. SNOW IS CURRENTLY THE
DOMINANT PRECIPITATION TYPE WITH THIS EVENT. HOWEVER...AS THIS
FRONT MOVES EASTWARD...AND THE SOUTHERN PORTION OF IT
STRENGTHENS...HEAVY RAIN FUELED BY MOISTURE FROM THE GULF OF
MEXICO WILL BEGIN TO POUND THE EASTERN GREAT PLAINS AND THE
MISSISSIPPI RIVER VALLEY. THE HEAVY SNOW THREAT WILL DIMINISH AS
THE SYSTEM MOVES AWAY FROM THE LEE OF THE ROCKIES. STRONG WINDS
ARE STILL AFFECTING THE SOUTHWESTERN U.S. BEHIND THIS COLD
FRONT...BUT THEY ARE EXPECTED TO DIE DOWN OVER THE NEXT 24 HOURS
AS THE PRESSURE GRADIENT WEAKENS.
A WELCOME GLIMPSE OF BLUE SKY IS ON TAP FOR THE EAST COAST AFTER
SPENDING THE BEGINNING OF THE WORK WEEK UNDER THE GLOOM OF A MAJOR
RAIN MAKER. THE REMAINING RAIN ASSOCIATED WITH THE SYSTEM EXITING
THE EAST COAST WILL BE OUT OF THE NORTHEASTERN U.S. STATES
THURSDAY MORNING. IT WILL BE REPLACED BY AN AREA OF HIGH PRESSURE
THAT WILL BE PRESENT FOR THE REMAINDER OF THE WEEK. PARTLY TO
MOSTLY SUNNY SKIES WILL REIGN OVER THE EAST THROUGH FRIDAY
MORNING...AS WILL SLIGHTLY WARMER THAN AVERAGE TEMPERATURES.
HOWEVER...EXPECT THE PRECIPITATION TO RETURN FOR THE WEEKEND AS
THE FRONTAL SYSTEM IN THE PLAINS APPROACHES THE COAST.
RAIN WILL BE A REOCCURRING THEME FOR THE NORTHWEST AS A TRAIN OF
PACIFIC SYSTEMS CONTINUE TO APPROACH THE COAST. PRECIPITATION WILL
BEGIN OVERNIGHT TONIGHT AND CONTINUE THROUGH THE REMAINDER OF THE
WORK WEEK. RAIN WILL BE PREDOMINANT ALONG THE COAST...CHANGING TO
SNOW WHEN IT ENTERS THE HIGHER TERRAIN OF THE INTERMOUNTAIN WEST.
AN AREA OF RAIN MIXED WITH FREEZING RAIN WILL BE PRESENT IN THE
AREA WHERE THE CHANGE OVER FROM RAIN TO SNOW IS OCCURRING.
COLLINS
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