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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 63

NWS STORM PREDICTION CENTER NORMAN OK

330 PM CDT SAT MAR 26 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF SOUTHERN ARKANSAS

       PARTS OF NORTHEASTERN LOUISIANA

       PARTS OF CENTRAL AND NORTHERN MISSISSIPPI



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 330 PM UNTIL

1000 PM CDT.



TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND

GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 35 MILES SOUTH OF EL DORADO

ARKANSAS TO 20 MILES EAST NORTHEAST OF COLUMBUS MISSISSIPPI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU3).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND 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.



OTHER WATCH INFORMATION...CONTINUE...WW 62...



DISCUSSION...AHEAD OF THE COLD FRONT ACROSS NWRN MS AND SRN AR THE

AIR MASS HAS BECOME QUITE UNSTABLE WITH MLCAPES AOA 2500 J/KG WITH

LITTLE REMAINING CINH.  THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY

ALONG AND JUST AHEAD OF THE COLD FRONT AS IT MOVES SEWD THRU THE

WATCH.  40-50 KT OF DEEP LAYER SHEAR AND STEEP LAPSE RATES FAVOR

SUPERCELL POTENTIAL.  IN ADDITION TO VERY LARGE HAIL THERE IS A

TORNADO THREAT WITH ANY SUPERCELL THAT FORMS.



AVIATION...TORNADOES AND 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

500. MEAN STORM MOTION VECTOR 27030.





...HALES

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