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000 

WWUS20 KWNS 072006

SEL9

SPC WW 072006

OKZ000-TXZ000-080300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 169

NWS STORM PREDICTION CENTER NORMAN OK

305 PM CDT MON APR 7 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       LARGE PART OF SOUTHWEST AND CENTRAL OKLAHOMA

       SMALL PART OF NORTHWEST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 305 PM UNTIL

1000 PM CDT.



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



DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 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 70 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES SOUTH SOUTHEAST OF

WICHITA FALLS TEXAS TO 30 MILES NORTH NORTHWEST OF OKLAHOMA CITY

OKLAHOMA.  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.



DISCUSSION...A VERY POTENT SUPERCELL ENVIRONMENT IS DEVELOPING

ACROSS THE WATCH AREA THIS AFTERNOON.  STRONG VEERING SHEAR PROFILES

COUPLED WITH AN INCREASINGLY UNSTABLE AIR MASS WILL SUPPORT

DEVELOPMENT OF SEVERE THUNDERSTORMS BOTH VICINITY E/W FRONTAL ZONE

CENTRAL OK AND ALONG AND E OF DRY LINE EXTENDING SWD INTO NWRN TX.

SUPERCELLS WILL RAPIDLY EVOLVE GIVEN SHEAR WITH ASSOCIATED VERY

LARGE HAIL AND TORNADO THREAT WITH ANY STORM.  POTENTIAL EXITS FOR

LONG LIVED SUPERCELLS MOVING ACROSS WARM SECTOR WITH POSSIBLE STRONG

TORNADOES.



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

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 25025.





...HALES

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