Saturday, December 3, 2011

DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 030937
SWOD48
SPC AC 030937

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0337 AM CST SAT DEC 03 2011

VALID 061200Z - 111200Z

...DISCUSSION...

TIMING DIFFERENCES BEGIN TO EMERGE AMONG THE MEDIUM RANGE MODELS
REGARDING THE PROGRESSION OF THE SWRN/SCNTRL U.S. TROUGH INTO THE
ERN U.S. THE GFS IS CONSIDERABLY FASTER EJECTING THE UPPER SYSTEM
INTO THE SRN APPALACHIANS THAN THE ECMWF...ALMOST BY ONE FULL DAY.
EVEN SO RETURN MOISTURE/INSTABILITY AHEAD OF THIS FEATURE WILL PROVE
INADEQUATE FOR SEVERE THUNDERSTORMS.

..DARROW.. 12/03/2011

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