URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 254
NWS STORM PREDICTION CENTER NORMAN OK
1030 AM EDT WED MAY 6 2009

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

LARGE PART OF NORTHERN AND CENTRAL ALABAMA
MUCH OF NORTH AND PARTS OF CENTRAL GEORGIA
PARTS OF WESTERN SOUTH CAROLINA

EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1030 AM UNTIL
700 PM EDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES WEST SOUTHWEST OF
AUBURN ALABAMA TO 70 MILES NORTHEAST OF ROME GEORGIA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 252...WW 253...

DISCUSSION...WELL DEVELOPED SQUALL LINE WITH EMBEDDED SUPERCELLS
WILL CONTINUE EWD ACROSS THE WATCH AREA. WITH STRONG VEERING SHEAR
PROFILES IN PLACE AND STEEP MID LEVEL LAPSE RATES ALONG WITH MLCAPES
AOA 1500 J/KG...SEVERE THREAT WILL CONTINUE AND LIKELY INCREASE WITH
DIURNAL HEATING. IN ADDITION TO TORNADO POTENTIAL ASSOCIATED WITH
ANY EMBEDDED ROTATIONS WITHIN LINE...MORE DISCRETE SUPERCELLS COULD
DEVELOP IN ADVANCE OF MAIN LINE AS AIR MASS CONTINUES TO
DESTABILIZE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...HALES

MESOSCALE DISCUSSION 0690
NWS STORM PREDICTION CENTER NORMAN OK
0313 PM CDT SUN MAY 03 2009

AREAS AFFECTED...ERN AL...WRN GA

CONCERNING...SEVERE THUNDERSTORM WATCH 233...

VALID 032013Z - 032115Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 233
CONTINUES.

SQUALL LINE HAS DEFINITELY SLOWED TO AROUND 40KT AS IT PROGRESSES
ACROSS CNTRL INTO ERN AL...THOUGH PRIMARY BOW ALONG NRN SECTIONS OF
LINE IS RACING NNEWD AT ROUGHLY 50KT INTO TALLADEGA COUNTY. AHEAD
OF THIS BOW ECHO...ONE LONE SUPERCELL CONTINUES ITS NEWD TRACK ALONG
OLD BOUNDARY INTO CALHOUN COUNTY. THIS LEAD SUPERCELL SHOULD TRACK
INTO POLK/FLOYD COUNTY REGION OF GA WITHIN THE HOUR. GIVEN THE
FORWARD PROGRESS OF THIS LINEAR MCS HAS SLOWED IT APPEARS OVERALL
SEVERE THREAT WILL LINGER ACROSS WW233 FOR SEVERAL MORE HOURS. FOR
THIS REASON IT WILL BE NECESSARY TO EXTEND THE WATCH IN TIME.