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818 

WWUS20 KWNS 091750

SEL2

SPC WW 091750

ARZ000-LAZ000-OKZ000-TXZ000-100100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 282

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM CDT SAT MAY 9 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF SOUTHERN ARKANSAS

       NORTHERN LOUISIANA

       SMALL PART OF SOUTHEAST OKLAHOMA

       PARTS OF NORTHEAST TEXAS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 PM CDT.



HAIL TO 3 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 75

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 65 MILES SOUTHWEST

OF DE QUEEN ARKANSAS TO 45 MILES EAST SOUTHEAST OF MONTICELLO

ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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.



OTHER WATCH INFORMATION...CONTINUE...WW 280...WW 281...



DISCUSSION...THUNDERSTORMS WILL INCREASE IN BOTH NUMBER AND

INTENSITY ALONG AND N OF E/W BOUNDARY VICINITY LA/AR BORDER.  WITH

MLCAPES IN WARM SECTOR AOA 2500 J/KG AND 40KT OF DEEP LAYER

SHEAR...SUPERCELLS ARE POSSIBLE INCLUDING VERY LARGE HAIL.  STORMS

COULD EVOLVE INTO LINE SEGMENTS/BOWS WITH AN ENHANCED WIND DAMAGE

THREAT AS THEY MOVE E VICINITY OF BOUNDARY.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 27025.





...HALES

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