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678 

WWUS20 KWNS 221217

SEL9

SPC WW 221217

MSZ000-CWZ000-221700-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 99

NWS STORM PREDICTION CENTER NORMAN OK

715 AM CDT THU MAR 22 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       FAR SOUTHEASTERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING FROM 715 AM UNTIL NOON 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 35 MILES NORTHWEST OF MOBILE

ALABAMA TO 40 MILES SOUTH SOUTHEAST OF GULFPORT MISSISSIPPI.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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.



DISCUSSION...N-S BAND OF TSTMS /WITH EMBEDDED SUPERCELL STRUCTURES/

IS EXPECTED TO PERSIST THIS MORNING AS REGION IS GLANCED BY A

MIDLEVEL IMPULSE LIFTING NEWD THROUGH THE SABINE RIVER VALLEY.

AMBIENT INFLOW AIR MASS REMAINS MOIST AND MODERATELY UNSTABLE...AND

MOB VAD DATA CONTINUE TO INDICATE STRONGER LOW-LEVEL FLOW /AND

RESULTING SHEAR/ THAN NUMERICAL FORECASTS.  AS SUCH...A RISK FOR

BRIEF TORNADOES AND/OR LOCALLY DAMAGING WIND GUSTS WILL PERSIST

THROUGH THIS MORNING.



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

450. MEAN STORM MOTION VECTOR 20025.





...MEAD

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