SWOD48
SPC AC 290926
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0326 AM CST WED DEC 29 2010
VALID 011200Z - 061200Z
...DISCUSSION...
BASED ON 00Z ECMWF/GEFS GUIDANCE...THE BRUNT OF WHAT WILL BE A DEEP
CENTRAL CONUS UPPER TROUGH IS EXPECTED TO TRANSITION NORTHEASTWARD
OVER THE NORTHEAST STATES/EASTERN CANADA THIS WEEKEND...WITH
RELATIVELY LOW AMPLITUDE WESTERLIES PREVALENT IN ITS WAKE. A FEW
SEVERE STORMS CANNOT BE RULED OUT ACROSS THE SOUTHEAST STATES ON DAY
4/NEW YEARS DAY ALONG/AHEAD OF THE EASTWARD ADVANCING COLD
FRONT...BUT OVERALL SEVERE TSTM POTENTIAL APPEARS LOW/ISOLATED...AND
A 30 PERCENT EQUIVALENT RISK AREA IS NOT WARRANTED.
THEREAFTER...SEVERE TSTM POTENTIAL WILL BE QUITE LOW/VIRTUALLY NIL
AS THE COLD FRONT SWEEPS OFFSHORE AND SURFACE HIGH PRESSURE AND
COOL/STABLE CONDITIONS PREVAIL EAST OF THE ROCKIES BY DAYS 5/6
SUNDAY/MONDAY. ACCORDINGLY...AN APPRECIABLE RISK FOR SEVERE TSTMS IS
NOT ANTICIPATED THROUGH EARLY NEXT WEEK.
..GUYER.. 12/29/2010
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