ACUS48 KWNS 040911
SWOD48
SPC AC 040910
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0310 AM CST WED DEC 04 2013
VALID 071200Z - 121200Z
...DISCUSSION...
GUIDANCE HAS BECOME INCREASINGLY CONSISTENT WITH THE HANDLING OF A
VIGOROUS SHORTWAVE IMPULSE EMBEDDED WITHIN THE POSITIVE-TILT WRN
CONUS LONGWAVE TROUGH. THIS IMPULSE IS PROGGED TO EJECT TOWARDS THE
CNTRL PLAINS AROUND D5 AND THE GREAT LAKES NEAR D6. POLAR FRONT OVER
THE SOUTHEAST SHOULD RETREAT WWD IN RESPONSE TO THIS TROUGH...WITH
CYCLOGENESIS OCCURRING WELL N OF THIS FRONT INVOF MIDWEST/GREAT
LAKES. A RELATIVELY CONFINED OVERLAP OF A GULF AIR MASS WITH
STRENGTHENING LOW-LEVEL WINDS OWING TO THE GLANCING INFLUENCE OF THE
SHORTWAVE TROUGH IS APPARENT. THIS MAY EVENTUALLY WARRANT MARGINAL
SEVERE RISK PROBABILITIES IN LATER OUTLOOKS CENTERED ON D5 OVER
PARTS OF MS/AL.
..GRAMS.. 12/04/2013
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