

000 

WWUS20 KWNS 242100

SEL9

SPC WW 242100

TXZ000-250400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 179

NWS STORM PREDICTION CENTER NORMAN OK

400 PM CDT TUE APR 24 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 400 PM UNTIL

1100 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 3.5 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 55 MILES SOUTH SOUTHWEST OF

DEL RIO TEXAS TO 30 MILES NORTHWEST OF WACO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU9).



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 172...WW 173...WW

174...WW 175...WW 176...WW 177...WW 178...



DISCUSSION...SUPERCELLS WITH AN ATTENDANT THREAT FOR VERY LARGE

HAIL...HIGH WIND AND POSSIBLY A STRONG TORNADO OR TWO...WILL DEVELOP

OVER THE CNTRL/S TX AREA THROUGH THIS EVENING.  CONTINUED SFC

HEATING...RICH MOISTURE INFLOW AND ARRIVAL OF SW TX UPR DISTURBANCE

SHOULD CREATE FAVORABLE ENVIRONMENT FOR A FEW LONG-LIVED

STORMS...ESPECIALLY ALONG WSW/ENE AXIS OVER CNTRL TX ALONG SRN

FRINGE OF STORMS THAT FORMED EARLIER IN THE DAY.



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

SURFACE AND ALOFT TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 24035.





...CORFIDI

