Mesoscale Discussion #2353

MESOSCALE DISCUSSION 2353
NWS STORM PREDICTION CENTER NORMAN OK
0909 PM CST WED NOV 05 2008

AREAS AFFECTED…CENTRAL/EASTERN OK AND SOUTHEAST KS

CONCERNING…TORNADO WATCH 924…

VALID 060309Z – 060415Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 924 CONTINUES.

TORNADO WATCH 924 IS SCHEDULED TO EXPIRE AT 04Z. SOME POTENTIAL FOR
ISOLATED TORNADOES CONTINUES…IN ADDITION TO SEVERE HAIL/WIND
GUSTS. A LOCAL WFO EXTENSION OR WATCH REPLACEMENT WILL LIKELY BE
COORDINATED BY AROUND 0330Z/930 PM CST.

A NUMBER OF SEVERE TSTMS/SUPERCELLS WITH A HISTORY OF LARGE
HAIL/STRONG WINDS AND BOUTS OF APPRECIABLE LOW LEVEL ROTATION
CONTINUE ESPECIALLY ACROSS PORTIONS OF EAST CENTRAL/NORTHEAST OK
THIS EVENING. WHILE THE OVERALL TORNADO THREAT APPEARS LIMITED GIVEN
INCREASING NEAR-SURFACE INHIBITION AND WEAK BUOYANCY…STRONG LOW
LEVEL SRH WITH 300-500 MS/S2 0-1 KM WILL CONTINUE TO SUPPORT
PERIODIC LOW LEVEL ROTATION /AND THUS A CONDITIONAL TORNADO THREAT/
WITH ANY SUSTAINED SUPERCELL. WITH A SOUTH-SOUTHWESTERLY LOW LEVEL
JET HAVING ALREADY INCREASED TO 50+ KT…THIS VERY STRONG LOW LEVEL
SRH IS REFLECTED IN DATA DERIVED FROM THE NORMAN/TULSA/SPRINGFIELD
WSR-88D/S. WHILE THE SEVERE THREAT SHOULD GRADUALLY DIMINISH THROUGH
LATE EVENING INTO THE OVERNIGHT…AN ADDITIONAL WATCH OR WFO
EXTENSION WILL LIKELY NEED TO BE CONSIDERED SHORTLY.

..GUYER.. 11/06/2008