

000 

WWUS20 KWNS 132025

SEL5

SPC WW 132025

TXZ000-140500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 135

NWS STORM PREDICTION CENTER NORMAN OK

325 PM CDT FRI APR 13 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTH CENTRAL TEXAS



EFFECTIVE THIS FRIDAY AFTERNOON FROM 325 PM UNTIL MIDNIGHT CDT.



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



DESTRUCTIVE TORNADOES...LARGE 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 EAST AND WEST OF A LINE FROM 15 MILES NORTH OF SHERMAN

TEXAS TO 45 MILES WEST SOUTHWEST OF TEMPLE TEXAS.  FOR A COMPLETE

DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE

(WOUS64 KWNS WOU5).



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 133...WW 134...



DISCUSSION...SUPERCELL THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS

AFTERNOON ALONG SURFACE DRYLINE OVER WESTERN NORTH TX.  THESE STORMS

WILL TRACK EAST-NORTHEASTWARD ACROSS THE DFW METRO AREA THIS

EVENING...WHILE OTHER MORE ISOLATED FORM ACROSS THE REGION.  VERY

STRONG LOW LEVEL VERTICAL SHEAR PROFILES AND FAVORABLE LOW LEVEL

MOISTURE PARAMETERS SUGGEST THE THREAT OF STRONG TORNADOES ACROSS

THE WATCH AREA.



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

500. MEAN STORM MOTION VECTOR 24035.





...HART

