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034 

WWUS20 KWNS 301729

SEL1

SPC WW 301729

ARZ000-LAZ000-MSZ000-310000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 321

NWS STORM PREDICTION CENTER NORMAN OK

1230 PM CDT WED MAY 30 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME EAST CENTRAL AND SOUTHEAST ARKANSAS

       NORTHEAST LOUISIANA

       NORTHERN AND CENTRAL MISSISSIPPI



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL

700 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 75

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH

NORTHWEST OF OXFORD MISSISSIPPI TO 20 MILES SOUTHWEST OF JACKSON

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.



DISCUSSION...IN ADVANCE OF A SHORT WAVE TROUGH MOVING ACROSS AR...A

BAND OF STRONG STORMS MOVING INTO ERN AR IS EXPECTED TO INTENSIFY AS

IT PROGRESSES EWD INTO AN INCREASINGLY UNSTABLE ENVIRONMENT WITH

MLCAPE TO 2000 J/KG.  ADDITIONAL STORMS ARE DEVELOPING WITHIN A

CU/TCU FIELD NEAR THE MS RIVER OVER WEST CENTRAL MS INTO NERN LA.

STORMS WILL HAVE POTENTIAL TO PRODUCE LARGE HAIL AND STRONG WIND

GUSTS THROUGH THE AFTERNOON AS THEY SPREAD EWD WITH TIME.



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 550. MEAN STORM

MOTION VECTOR 27020.





...WEISS

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