

000 

WWUS20 KWNS 012047

SEL7

SPC WW 012047

TXZ000-020400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 207

NWS STORM PREDICTION CENTER NORMAN OK

350 PM CDT TUE MAY 1 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH CENTRAL TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 350 PM UNTIL

1100 PM 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 30 MILES SOUTHWEST OF

JUNCTION TEXAS TO 55 MILES SOUTHEAST OF COLLEGE STATION 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.



OTHER WATCH INFORMATION...CONTINUE...WW 205...WW 206...



DISCUSSION...VERY UNSTABLE AIRMASS WITH MLCAPES TO 3000 J/KG COUPLED

WITH 20-30KT OF LOW LEVEL SHEAR SUPPORT DEVELOPMENT OF SUPERCELL

THUNDERSTORMS.  STORMS EXPECTED TO INCREASE IN NUMBER AND INTENSITY

ALONG E/W BOUNDARY AND THEN MOVE SLOWLY SEWD.  VERY LARGE HAIL AND

POSSIBLE TORNADOS WILL BE ASSOCIATED WITH SUPERCELLS.



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 29020.





...HALES

