SWOMCD
SPC MCD 062329
NCZ000-VAZ000-SCZ000-070100-
MESOSCALE DISCUSSION 0737
NWS STORM PREDICTION CENTER NORMAN OK
0629 PM CDT WED MAY 06 2009
AREAS AFFECTED...SOUTHERN/EASTERN VA AND WESTERN/CENTRAL/NORTHERN NC
INTO UPSTATE SC
CONCERNING...TORNADO WATCH 256...
VALID 062329Z - 070100Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 256 CONTINUES.
TORNADO WATCH 256 CONTINUES UNTIL 01Z ACROSS SOUTHERN/EASTERN VA AND
WESTERN/CENTRAL/NORTHERN NC INTO UPSTATE SC...WITH A CONTINUED
ISOLATED TORNADO RISK IN ADDITION TO SEVERE HAIL/DAMAGING WINDS.
CURRENT INDICATIONS ARE THAT AN ADDITIONAL/REPLACEMENT TORNADO WATCH
MAY BE NEEDED ESPECIALLY FOR PORTIONS OF VA/NC PRIOR TO 01Z.
LATEST SURFACE ANALYSIS FEATURES SLOW NORTHWARD-MOVING ROUGHLY
WEST-EAST FRONTAL BOUNDARY ACROSS SOUTHERN VA...WITH A WARM/UNSTABLE
BOUNDARY LAYER IN PLACE ACROSS UPSTATE PORTIONS OF SC/NC INTO SOUTH
CENTRAL/SOUTHEAST VA EARLY THIS EVENING. WITHIN THIS
REGIME...ISOLATED TO SCATTERED SUPERCELLS SHOULD REMAIN COMMON OVER
THE NEXT FEW HOURS ESPECIALLY FROM THE NC PIEDMONT INTO
SOUTHERN/SOUTHEAST VA. AMPLE DEEP LAYER SHEAR AND SUFFICIENT 0-1 KM
SRH REFLECTED IN REGIONAL WSR-88D VWPS...WITH ADDITIONAL
STRENGTHENING IN THE LOWEST 1-2 KM ANTICIPATED THROUGH MID
EVENING...WILL MAINTAIN A SUPERCELL AND ISOLATED TORNADO/SEVERE HAIL
RISK ACROSS NC INTO SOUTHERN/EASTERN VA. WITH THIS THREAT
POTENTIALLY EXTENDING BEYOND THE SCHEDULED 01Z EXPIRATION OF WW
256...AN ADDITIONAL WATCH OR LOCAL EXTENSION COULD BE NEEDED PRIOR
TO 01Z.
..GUYER.. 05/06/2009
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...AKQ...MHX...RAH...ILM...RNK...CAE...GSP...
LAT...LON 36617970 37697786 37897611 36107619 34787983 34168221
34928224 36128057 36617970
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