

000 

WWUS20 KWNS 081701

SEL7

SPC WW 081701

TXZ000-090000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 257

NWS STORM PREDICTION CENTER NORMAN OK

1205 PM CDT TUE MAY 8 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1205 PM UNTIL

700 PM CDT.



TORNADOES...HAIL TO 2 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 85 MILES NORTH NORTHEAST OF

BIG SPRING TEXAS TO 65 MILES SOUTH SOUTHWEST OF FORT STOCKTON

TEXAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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.



DISCUSSION...LINE OF STRONG/SEVERE THUNDERSTORMS WILL CONTINUE EWD

ACROSS WATCH.  WITH STRONG VEERING LOW LEVEL SHEAR...VICINITY OF E/W

BOUNDARY AND MLCAPES TO 1500 J/KG...EMBEDDED SUPERCELLS IN THE LINE

ARE LIKELY.  ALONG WITH DAMAGING WINDS...TORNADOES WILL BE POSSIBLE

WITH ANY SUPERCELL THAT CAN DEVELOP.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24030.





...HALES

