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516 

WWUS20 KWNS 110452

SEL1

SPC WW 110452

ARZ000-LAZ000-MSZ000-TXZ000-111000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 371

NWS STORM PREDICTION CENTER NORMAN OK

1150 PM CDT WED JUN 10 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN AND EASTERN ARKANSAS

       NORTHERN LOUISIANA

       WESTERN MISSISSIPPI

       EAST TEXAS



EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1150 PM

UNTIL 500 AM CDT.



HAIL TO 1.5 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 EAST AND WEST OF A LINE FROM 25 MILES WEST OF

NATCHITOCHES LOUISIANA TO 40 MILES WEST NORTHWEST OF OXFORD

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 367...WW 368...WW

369...WW 370...



DISCUSSION...SW AR/NW LA BOW MCS EXPECTED TO CONTINUE ENE AT ABOUT

40 KTS.  SHV VWP SAMPLED 50 KT WLY REAR INFLOW JET WITH SYSTEM.

COUPLED WITH EXISTING SFC-BASED INSTABILITY PATTERN...EXPECT THAT

CONVECTIVE SYSTEM WILL CONTINUE TO POSE A CHANCE FOR DMGG WINDS AT

LEAST AS FAR E AS THE MS RVR.  MORE PERSISTENT/TRAINING STORMS ON

TRAILING SW PART OF ASSOCIATED ELONGATING COLD POOL MAY POSE A

THREAT FOR WIND/HAIL THROUGH 10Z ACROSS NRN LA.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 25040.





...CORFIDI

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