

000 

WWUS20 KWNS 172129

SEL3

SPC WW 172129

ARZ000-LAZ000-OKZ000-TXZ000-180500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 713

NWS STORM PREDICTION CENTER NORMAN OK

430 PM CDT WED OCT 17 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF ARKANSAS

       NORTHERN LOUISIANA

       NORTHEAST OKLAHOMA

       NORTHEAST TEXAS



EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 430 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 2 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 105 STATUTE

MILES EAST AND WEST OF A LINE FROM 30 MILES NORTHWEST OF HARRISON

ARKANSAS TO 25 MILES SOUTHWEST OF NATCHITOCHES LOUISIANA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU3).



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 709...WW 710...WW

711...WW 712...



DISCUSSION...SEVERAL CLUSTERS OF INTENSE THUNDERSTORMS ARE

CONTINUING ACROSS PARTS OF EASTERN OK/TX AND SOUTHERN AR/NORTHERN

LA.  THIS ACTIVITY WILL PERSIST AND POSSIBLY STRENGTHEN THROUGH THE

EVENING AS UPPER TROUGH AND STRONGEST MID LEVEL WINDS APPROACH.

WIDESPREAD SUFFICIENT INSTABILITY AND FAVORABLE VERTICAL SHEAR

PROFILES SUGGEST THE THREAT OF ISOLATED TORNADOES...DAMAGING

WINDS...AND HAIL WILL STORMS THROUGHOUT THE REGION.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24035.





...HART

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