Sunday, November 15, 2009

DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 150803
SWODY3
SPC AC 150802

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0202 AM CST SUN NOV 15 2009

VALID 171200Z - 181200Z

...SYNOPSIS...
STG SHORTWAVE TROUGH -- NOW MOVING FROM ERN GREAT BASIN REGION
ACROSS 4-CORNERS AREA -- IS FCST TO EVOLVE INTO PRONOUNCED...CLOSED
AND TEMPORARILY CUT-OFF CYCLONE OVER WRN OZARKS REGION BY BEGINNING
OF PERIOD. LOW-LEVEL CYCLONE ALSO IS EXPECTED TO BECOME MORE
VERTICALLY STACKED WITH CENTER OF CIRCULATION ALOFT. RESULTING
DEEP-TROPOSPHERIC LOW THEN SHOULD OCCLUDE...BEGIN TO FILL...AND
DRIFT ABOUT SRN/CENTRAL MO BEFORE AGAIN BECOMING ENTRAINED IN
PREVAILING WLYS DAYS 4-5. AS THIS OCCURS...SFC COLD FRONT WILL MOVE
SWD ACROSS WRN GULF...SEWD OVER N-CENTRAL GULF AND EWD ACROSS
AL/GA...DECELERATING THROUGH END OF PERIOD AND MERGING WITH ERN
CONUS DAMMING FRONT OVER SRN APPALACHIANS REGION. IN WARM SECTOR S
OF THESE BOUNDARIES...WEAKNESS OF BOTH INSTABILITY AND LOW-LEVEL
CONVERGENCE SHOULD PRECLUDE ORGANIZED SVR THREAT.

AMPLIFYING MID-UPPER TROUGH OVER NERN PACIFIC WILL REACH W COAST
AROUND END OF PERIOD...POTENTIALLY BRINGING SOME POTENTIAL FOR
NON-SVR NOCTURNAL TSTMS TO PORTIONS NRN CA AND/OR PAC NW.

..EDWARDS.. 11/15/2009

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