Wednesday, March 26, 2008

DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 260854
SWOD48
SPC AC 260853

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0353 AM CDT WED MAR 26 2008

VALID 291200Z - 031200Z

..DISCUSSION...
PROGRESSIVE NRN STREAM PATTERN WILL CONTINUE THROUGH MUCH OF THIS
PERIOD...AS FLOW ACROSS CONUS REMAINS DOMINATED BY MOSTLY
LOW-AMPLITUDE SHORTWAVE TROUGHS. ONE EXCEPTION WILL BE STG
SHORTWAVE THAT SHOULD MOVE FROM PACIFIC NW DAY-3...ENEWD FROM MT
ACROSS MB/ND TO WRN PORTION OF NW ONT DAY-4/29TH-30TH. LEE
CYCLOGENESIS IS LIKELY TO ITS S AND SE OVER CENTRAL HIGH PLAINS.
DECAYING SFC FRONTAL ZONE -- DISCUSSED IN DAY 3 OUTLOOK -- SHOULD
PREVENT RETURN OF FAVORABLE MOISTURE INTO CENTRAL HIGH PLAINS WHERE
STRONGEST LOW LEVEL FORCING WILL OCCUR. TSTMS -- SOME POSSIBLY SVR
-- MAY DEVELOP DAYS 5-6/30TH-1ST OVER PORTIONS MS VALLEY AND SRN
PLAINS...ALONG ANOTHER COLD FRONT TRAILING SWWD FROM EJECTING
LEE/FRONTAL LOW. HOWEVER...DEVELOPMENT OF WELL-ORGANIZED SVR EVENT
WILL DEPEND STRONGLY ON MESOSCALE AND FRONTAL INFLUENCES THAT REMAIN
HIGHLY UNCERTAIN THIS FAR OUT.

.EDWARDS.. 03/26/2008

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