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874 

WWUS20 KWNS 102127

SEL9

SPC WW 102127

TXZ000-110500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 149

NWS STORM PREDICTION CENTER NORMAN OK

430 PM CDT MON MAY 10 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF NORTHWEST TEXAS



EFFECTIVE THIS MONDAY AFTERNOON FROM 430 PM UNTIL MIDNIGHT 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 60 STATUTE

MILES EAST AND WEST OF A LINE FROM 35 MILES EAST NORTHEAST OF

WICHITA FALLS TEXAS TO 45 MILES WEST OF BROWNWOOD 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 146...WW 147...WW 148...



DISCUSSION...RAPID DEVELOPMENT OF SEVERE THUNDERSTORMS EXPECTED

ALONG THE DRY LN AS IT MOVES INTO AN EXTREMELY UNSTABLE AIR MASS.

40-50KT OF SHEAR COUPLED WITH MLCAPES AOA 3000 J/KG WILL SUPPORT

SUPERCELLS INCLUDING BOTH VERY LARGE HAIL AND ISOLATED 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

600. MEAN STORM MOTION VECTOR 24040.





...HALES

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