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WWUS20 KWNS 270726

SEL5

SPC WW 270726

ALZ000-LAZ000-MSZ000-TNZ000-271300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 225

NWS STORM PREDICTION CENTER NORMAN OK

225 AM CDT WED APR 27 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       NORTHERN AND WESTERN ALABAMA

       EXTREME NORTHEAST LOUISIANA

       CENTRAL AND NORTHEAST MISSISSIPPI

       SOUTHERN MIDDLE TENNESSEE



EFFECTIVE THIS WEDNESDAY MORNING FROM 225 AM UNTIL 800 AM CDT.



TORNADOES...HAIL TO 2 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 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHEAST OF

HUNTSVILLE ALABAMA TO 55 MILES EAST SOUTHEAST OF NATCHEZ

MISSISSIPPI.  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 222...WW 223...WW 224...



DISCUSSION...WELL-DEVELOPED LINEAR MCS WITH EMBEDDED BOW/SUPERCELL

STRUCTURES WILL LIKELY PERSIST THROUGH THE MORNING HOURS WHILE

PROGRESSING ENEWD FROM MS INTO WRN/NRN AL.  STRONG VERTICAL SHEAR

AND SUFFICIENT INSTABILITY WILL MAINTAIN THE CONVECTION...WITH A

CONTINUED RISK FOR A FEW TORNADOES...DAMAGING WINDS...AND LARGE

HAIL.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

550. MEAN STORM MOTION VECTOR 25045.





...THOMPSON

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