Monday, December 31, 2007

DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 310931
SWOD48
SPC AC 310930

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0330 AM CST MON DEC 31 2007

VALID 031200Z - 081200Z

..DISCUSSION...

LATEST MEDIUM RANGE MODEL GUIDANCE IS IN GENERAL AGREEMENT WITH
OVERALL PATTERN EVOLUTION ACROSS THE LOWER 48 STATES. BOTH THE
ECMWF AND GFS SUGGEST A SLOW AIRMASS MODIFICATION ACROSS THE WRN
GULF OF MEXICO BY THE END OF THE WEEK AS SLY FLOW INCREASES ACROSS
THE PLAINS IN ADVANCE OF A BROAD UPPER TROUGH. ALTHOUGH SEVERAL
SHORTWAVE TROUGHS SHOULD EJECT WELL AHEAD OF THE MAIN UPPER
TROUGH...LIKELY PRODUCING AT LEAST WEAK CONVECTION...ORGANIZED
SEVERE POTENTIAL SHOULD REMAIN RATHER LOW UNTIL HIGHER THETAE
AIRMASS/INSTABILITY RETURNS...MORE LIKELY BEYOND THIS PERIOD.

.DARROW.. 12/31/2007

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