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000 

WWUS20 KWNS 070056

SEL9

SPC WW 070056

TXZ000-070700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 249

NWS STORM PREDICTION CENTER NORMAN OK

755 PM CDT SUN MAY 6 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST TEXAS



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 755 PM UNTIL

200 AM CDT.



TORNADOES...HAIL TO 2.5 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 EAST AND WEST OF A LINE FROM 30 MILES EAST SOUTHEAST OF

DRYDEN TEXAS TO 40 MILES EAST NORTHEAST OF BIG SPRING 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 246...WW 247...WW 248...



DISCUSSION...TSTM CLUSTER WITH EMBEDDED SUPERCELLS EXPECTED TO

DEVELOP MAINLY WSW ALONG EXISTING SW TX CONFLUENCE ZONE.  SELY

NEAR-SFC FLOW WILL MAINTAIN RICH MOISTURE FEED...WITH 40 KT SWLY MID

LEVEL WINDS SUPPORTING ADDITIONAL SUSTAINED UPDRAFTS.  DEGREE OF

CAPE AND MOISTURE AVAILABILITY SUGGEST POTENTIAL FOR ISOLATED

TORNADOES IN ADDITION TO LARGE HAIL/HIGH WIND.



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

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 07015.





...CORFIDI

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