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757 

WWUS20 KWNS 132253

SEL0

SPC WW 132253

ARZ000-MSZ000-140500-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 400

NWS STORM PREDICTION CENTER NORMAN OK

555 PM CDT SAT JUN 13 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN ARKANSAS

       CENTRAL MISSISSIPPI



EFFECTIVE THIS SATURDAY AFTERNOON FROM 555 PM UNTIL MIDNIGHT 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 45

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH

SOUTHWEST OF HOT SPRINGS ARKANSAS TO 40 MILES NORTHEAST OF

MERIDIAN MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 397...WW 398...WW 399...



DISCUSSION...WDLY SCTD SUSTAINED STORMS/SUPERCELLS EXPECTED TO

PERSIST ALONG WNW-ESE ORIENTED QSTNRY BOUNDARY ALONG N SIDE OF WW.

DEGREE OF INSTABILITY AND AVAILABILITY OF RICH LOW LVL MOISTURE

SUGGEST POTENTIAL FOR HAIL/LOCALLY DMGG WIND AND PERHAPS A BRIEF

TORNADO DESPITE WEAK LOW LVL INFLOW /REF MCD 1098/.



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 500. MEAN STORM

MOTION VECTOR 30025.





...CORFIDI

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