Tornado Watch 254

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 254
NWS STORM PREDICTION CENTER NORMAN OK
510 PM CDT FRI MAY 2 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SMALL PART OF SOUTHERN ARKANSAS
LARGE PART OF NORTHERN LOUISIANA
PARTS OF CENTRAL MISSISSIPPI
EFFECTIVE THIS FRIDAY AFTERNOON FROM 510 PM UNTIL MIDNIGHT CDT.
TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH SOUTHWEST OF
SHREVEPORT LOUISIANA TO 15 MILES SOUTHEAST OF JACKSON
MISSISSIPPI. 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 251
...
WW 252
...
WW 253
...
DISCUSSION...A VERY UNSTABLE AIRMASS WITH MLCAPES AOA 3000 J/KG
COUPLE WITH STRONG VEERING SHEAR PROFILES SUPPORTS SUPERCELL
DEVELOPMENT. AS STRONG JET MAX ROTATES ACROSS LOWER MS VALLEY THIS
EVENING...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY EWD
ACROSS THE WATCH. TORNADOES AND VERY LARGE HAIL WILL BE POSSIBLE
WITH ANY SUPERCELL.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 24030.
...HALES