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040 

WWUS20 KWNS 021950

SEL4

SPC WW 021950

TXZ000-030300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 324

NWS STORM PREDICTION CENTER NORMAN OK

250 PM CDT TUE JUN 2 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PORTIONS OF WESTERN AND NORTHERN TEXAS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 250 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 3 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 65 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST OF LUBBOCK

TEXAS TO 45 MILES EAST NORTHEAST OF BROWNWOOD TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU4).



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 321...WW 322...WW 323...



DISCUSSION...THUNDERSTORMS HAVE DEVELOPED RAPIDLY ALONG OUTFLOW

BOUNDARY...THAT EXTENDED FROM LBB SEWD TO NEAR ABI. THE COMBINATION

OF A VERY UNSTABLE AIR MASS AND DEEP LAYER SHEAR AT 30 KT WILL BE

FAVORABLE FOR ROTATING STORMS. THE VERY STEEP LAPSE RATES AND DEGREE

OF INSTABILITY SUGGESTS LARGE HAIL WILL BE THE MAIN THREAT.

HOWEVER...STORMS THAT MOVE MORE SOUTHWARD MAY ENCOUNTER SUFFICIENT

LOW LEVEL SRH FOR TORNADOES.



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

SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 32020.





...IMY

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