Monday, February 2, 2009

DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 020931
SWOD48
SPC AC 020931

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0331 AM CST MON FEB 02 2009

VALID 051200Z - 101200Z

...DISCUSSION...

LARGE SCALE TROUGHING IS EXPECTED TO DEVELOP ACROSS THE WRN U.S.
DURING THE LATTER PART OF THE WEEK. THIS EVOLUTION SHOULD RESULT IN
A GRADUAL RETURN OF MODIFIED LOW LEVEL MOISTURE ACROSS THE WRN GULF
OF MEXICO INTO THE SRN PLAINS AS SEVERAL EMBEDDED SHORTWAVE TROUGHS
EJECT NEWD ACROSS THE CNTRL U.S. GIVEN THAT SIGNIFICANT MOISTENING
WILL BE NECESSARY FOR ROBUST DEEP CONVECTION...IT APPEARS A
MULTI-DAY SLY COMPONENT WILL BE REQUIRED BEFORE SUFFICIENT
INSTABILITY WILL BE IN PLACE FOR ORGANIZED CONVECTION. LATEST MODEL
GUIDANCE SUGGESTS ENVIRONMENTAL CONDITIONS COULD SUPPORT
THUNDERSTORMS LATE SUNDAY INTO MONDAY FROM PORTIONS OF NWRN TX INTO
THE MID MS VALLEY AHEAD OF PROGRESSIVE COLD FRONT.

..DARROW.. 02/02/2009

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