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WWUS20 KWNS 221557

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SPC WW 221557

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URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 100

NWS STORM PREDICTION CENTER NORMAN OK

1055 AM CDT THU MAR 22 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST ALABAMA

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 1055 AM UNTIL

500 PM CDT.



TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 35 STATUTE

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

MOBILE ALABAMA TO 90 MILES NORTH NORTHEAST OF MOBILE ALABAMA.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 99...



DISCUSSION...BAND OF STRONG STORMS EXTENDING FROM THE GULF OF MEXICO

NNEWD TO NEAR THE SERN MS/SWRN AL BORDER IS EXPECTED TO MOVE SLOWLY

EWD AS CELLS MOVE NNEWD 25-35 KT.  ENVIRONMENT REMAINS SUPPORTIVE OF

STORM ROTATION WITH KMOB VAD PROFILE EXHIBITING 30-40 KT VEERING

FLOW IN THE LOWEST 1-3 KM...RESULTING IN 1 KM SHEAR OF 30 KT AND SRH

OF 300 M2/S2 IN THE LOWEST 2-3 KM...WITHIN UNSTABLE THERMODYNAMIC

CONDITIONS WITH MLCAPE OF 500-750 J/KG.  THREAT FOR EMBEDDED

SUPERCELLS WILL CONTINUE INTO THE AFTERNOON WITH LOCAL DAMAGING

WINDS AND BRIEF TORNADOES POSSIBLE.



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

SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

400. MEAN STORM MOTION VECTOR 20030.





...WEISS

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