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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 371

NWS STORM PREDICTION CENTER NORMAN OK

1230 PM CDT WED MAY 25 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND EASTERN ARKANSAS

       MISSOURI BOOTHEEL

       NORTHERN MISSISSIPPI

       WESTERN TENNESSEE



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1230 PM UNTIL

1000 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE 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 85 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 50 MILES NORTHWEST OF LITTLE

ROCK ARKANSAS TO 50 MILES EAST SOUTHEAST OF JACKSON TENNESSEE.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU1).



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 367...WW 368...WW

369...WW 370...



DISCUSSION...TSTM INITIATION IS EXPECTED WITHIN THE NEXT ONE TO TWO

HOURS WITHIN BROADLY CONFLUENT LOW-LEVEL FLOW REGIME IN PLACE ACROSS

AR.  HERE...AIR MASS IS ALREADY MODERATELY UNSTABLE WITH MLCAPE OF

2500 J/KG WITH FURTHER DESTABILIZATION EXPECTED THIS AFTERNOON.

THIS INSTABILITY AXIS COINCIDES WITH A 60-70 KT MIDLEVEL JET STREAK

AND 40-50 KT LLJ...RESULTING IN VERY STRONG LOW AND DEEP-LAYER SHEAR

ACROSS THE BROAD WARM SECTOR.  CURRENT INDICATIONS ARE THAT ONE OR

MULTIPLE FAST-MOVING BANDS OF SUPERCELLS ARE LIKELY THIS AFTERNOON

INTO EVENING WITH A THREAT FOR TORNADOES...SOME POTENTIAL STRONG TO

VIOLENT AND LONG-TRACKED...VERY LARGE HAIL AND DAMAGING WINDS.



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 25040.





...MEAD

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