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WWUS20 KWNS 271605

SEL2

SPC WW 271605

ARZ000-LAZ000-MSZ000-280000-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 232

NWS STORM PREDICTION CENTER NORMAN OK

1105 AM CDT WED APR 27 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       EXTREME SOUTHEAST ARKANSAS

       NORTHEAST LOUISIANA

       MUCH OF MISSISSIPPI



EFFECTIVE THIS WEDNESDAY MORNING AND EVENING FROM 1105 AM UNTIL

700 PM CDT.



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



DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE

POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE

MILES EAST AND WEST OF A LINE FROM 45 MILES EAST SOUTHEAST OF

NATCHEZ MISSISSIPPI TO 50 MILES NORTH OF TUPELO MISSISSIPPI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 229...WW 230...WW 231...



DISCUSSION...A VERY VOLATILE SETUP IS DEVELOPING FOR PORTIONS OF MS

LATER TODAY AS A MOIST AND VERY UNSTABLE AIR MASS RETURNS INTO AN

AREA WITH IMPRESSIVE LOW LEVEL AND DEEP LAYER VERTICAL SHEAR

PROFILES.  ACTIVITY IS CURRENTLY DEVELOPING OVER SOUTHEAST

AR/NORTHEAST LA.  HOWEVER...IT APPEARS THE PRIMARY CONCERN WILL

START BY EARLY AFTERNOON OVER CENTRAL/NORTHERN MS WHERE DISCRETE

TORNADIC SUPERCELLS ARE LIKELY.  ALL PARAMETERS SUGGEST THAT

STRONG/VIOLENT AND LONG-TRACK TORNADOES ARE POSSIBLE.  VERY LARGE

HAIL AND WIDESPREAD DAMAGING WINDS ARE ALSO A CONCERN.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

550. MEAN STORM MOTION VECTOR 25040.





...HART

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