

000 

WWUS20 KWNS 092033

SEL2

SPC WW 092033

TXZ000-100400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 262

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT WED MAY 9 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHWEST AND SOUTH TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 335 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 70 STATUTE

MILES EITHER SIDE OF A LINE FROM 85 MILES WEST OF JUNCTION TEXAS

TO 50 MILES EAST NORTHEAST OF LAREDO TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU2).



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...THUNDERSTORMS INCREASING ACROSS SWRN TX AHEAD OF TROUGH

APPROACHING FROM THE W.  WITH 18Z DRT SOUNDING INDICATING MLCAPES TO

1500 J/KG AND A FAVORABLE VEERING HODOGRAPH...SUPERCELLS ARE

EXPECTED.  ALONG WITH LARGE HAIL TORNADOES WILL BE POSSIBLE WITH ANY

SUPERCELL.  STORMS WILL LIKELY EVOLVE INTO A LINEAR MCS AND DEVELOP

SEWD ALONG AND E OF RIO GRANDE VALLEY THIS EVENING.



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 26025.





...HALES

