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916 

WWUS20 KWNS 121746

SEL9

SPC WW 121746

ARZ000-LAZ000-MSZ000-TNZ000-130100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 699

NWS STORM PREDICTION CENTER NORMAN OK

1245 PM CDT TUE OCT 12 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       PARTS OF EASTERN ARKANSAS

       PARTS OF NORTHEASTERN LOUISIANA

       MUCH OF NORTHERN AND PART OF CENTRAL MISSISSIPPI

       PARTS OF WESTERN TENNESSEE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1245 PM UNTIL

800 PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60

STATUTE MILES EAST AND WEST OF A LINE FROM 65 MILES SOUTH OF

GREENVILLE MISSISSIPPI TO 15 MILES WEST NORTHWEST OF JACKSON

TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



DISCUSSION...THUNDERSTORMS ARE INCREASING AND NUMBER AND INTENSITY

ACROSS ERN AR AHEAD OF UPPER LOW.  WITH CONTINUED HEATING...SEVERE

STORMS WILL BE POSSIBLE AS OVERALL ACTIVITY SPREADS EWD ACROSS THE

WATCH.  PRIMARY THREA WILL BE LARGE HAIL AND LOCAL DAMAGING WINDS



AVIATION...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 450. MEAN STORM

MOTION VECTOR 24030.





...HALES

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