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191 

WWUS20 KWNS 271843

SEL5

SPC WW 271843

ALZ000-GAZ000-MSZ000-TNZ000-280300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 235

NWS STORM PREDICTION CENTER NORMAN OK

145 PM CDT WED APR 27 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       MUCH OF ALABAMA

       NORTHWEST GEORGIA

       SOUTHEAST MISSISSIPPI

       SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 145 PM UNTIL

1000 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 80 STATUTE

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

HUNTSVILLE ALABAMA TO 60 MILES WEST SOUTHWEST OF EVERGREEN

ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 230...WW 231...WW

232...WW 233...WW 234...



DISCUSSION...A CLASSIC TORNADO OUTBREAK SITUATION IS DEVELOPING

ACROSS MUCH OF AL AS DISCRETE TORNADIC SUPERCELLS FORM OVER MS AND

TRACK ACROSS THE WATCH AREA.  STRONG LOW LEVEL AND DEEP LAYER

VERTICAL SHEAR...COMBINED WITH A MOIST AND MODERATELY UNSTABLE AIR

MASS...WILL POSE A DANGEROUS RISK OF STRONG/VIOLENT AND POTENTIALLY

LONG-TRACK TORNADOES.



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

500. MEAN STORM MOTION VECTOR 25040.





...HART

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