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000
FXUS01 KWBC 100858
PMDSPD
 
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
354 AM EST FRI FEB 10 2012
 
VALID 12Z FRI FEB 10 2012 - 12Z SUN FEB 12 2012
 
...ARCTIC AIR WILL SPREAD ACROSS MUCH OF THE EASTERN THIRD OF THE
COUNTRY IN THE NEXT COUPLE OF DAYS FOLLOWED BY A LARGE DEVELOPING
STORM OFF THE EAST COAST...

...PRECIPITATION EXPECTED TO PERSIST THROUGH EARLY SATURDAY IN THE
PACIFIC NORTHWEST...

A SURFACE WAVE TRACKING THROUGH THE DEEP SOUTH COULD RAISE SOME
HAVOC ALONG THE EASTERN SEABOARD BY EARLY SATURDAY MORNING. 
SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE ACROSS THE CENTRAL GULF
COAST STATES ON FRIDAY AS THE LOW TRACKS OUT OF THE SOUTHERN
PLAINS AND INTO THE SOUTHEAST.  PRECIPITATION TOTALS WILL BE
LIMITED...BUT A FEW HEAVY SHOWERS CANNOT BE RULED OUT WITH LOW
LEVEL SOUTHERLY FLOW CARRYING GULF MOISTURE NORTHWARD ACROSS THE
REGION.  THE SURFACE LOW IS EXPECTED TO REDEVELOP OFF THE
SOUTHEAST COAST AND INTENSIFY AS IT TRACKS NORTHWARD UP THE
EASTERN SEABOARD ON SATURDAY.  THIS COULD BRING SOME HEAVY RAINS
INTO THE COASTAL CAROLINAS...AND ACCUMULATING SNOWS ACROSS
SOUTHERN NEW ENGLAND.  THE STORM WILL BE QUICK TO EXIT INTO THE
CANADIAN MARITIMES LATE SATURDAY...KEEPING SNOWFALL TOTALS TO A
MINIMUM...BUT STRONG AND GUSTY WINDS WILL PERSIST ACROSS THE
NORTHEAST AND NORTHERN MID-ATLANTIC STATES THROUGH SUNDAY MORNING.

AN ARCTIC BOUNDARY AND ASSOCIATED LIGHT SNOW SHOWERS WILL CONTINUE
TO PUSH SOUTH AND EAST THROUGH THE GREAT LAKES AND MIDWEST ON
FRIDAY.  NORTHWESTERLY FLOW IN THE WAKE OF THE FRONT WILL FILTER
IN MUCH COOLER AIR AND ALLOW FOR SOME HEAVIER SNOWS ALONG THE
FAVORED SHORES OF THE LAKES AND UPSLOPE SIDE OF THE CENTRAL
APPALACHIANS.  STRONG SURFACE RIDGING SETTLING IN BEHIND THE
BOUNDARY WILL KEEP MUCH OF THE MIDDLE OF THE COUNTRY PRECIPITATION
FREE FOR THE WEEKEND.     

A COLD FRONT SLOWLY APPROACHING THE WEST COAST ON FRIDAY WILL
ALLOW SHOWER ACTIVITY TO CONTINUE ACROSS THE PACIFIC NORTHWEST
THROUGH EARLY SATURDAY.  THE SURFACE BOUNDARY WILL WEAKEN AS IT
MOVES ONSHORE...AND ANY HEAVY PRECIPITATION ACROSS THE REGION
SHOULD COME TO AN END.  HOWEVER...THE UPPER TROUGH SUPPORTING THIS
SYSTEM WILL BEGIN TO DIG INTO THE WESTERN U.S. ON
SATURDAY...TRIGGERING WIDESPREAD...BUT LIGHT...SHOWERS ACROSS MUCH
OF THE WESTERN THIRD OF THE COUNTRY.  

GERHARDT


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