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WWUS20 KWNS 042249

SEL7

SPC WW 042249

ALZ000-FLZ000-GAZ000-LAZ000-MSZ000-CWZ000-050500-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 167

NWS STORM PREDICTION CENTER NORMAN OK

550 PM CDT FRI APR 4 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHERN ALABAMA

       WESTERN FLORIDA PANHANDLE

       SOUTHWEST INTO CENTRAL GEORGIA

       SOUTHEAST LOUISIANA

       SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS FRIDAY AFTERNOON FROM 550 PM UNTIL MIDNIGHT CDT.



TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND

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

AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 40 MILES WEST SOUTHWEST OF

BATON ROUGE LOUISIANA TO 35 MILES SOUTH OF MACON GEORGIA.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU7).



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...THIS TORNADO WATCH REPLACES TORNADO

WATCH NUMBER 164. WATCH NUMBER 164 WILL NOT BE IN EFFECT AFTER

550 PM CDT. CONTINUE...WW 165...WW 166...



DISCUSSION...STORMS WILL CONTINUE AHEAD OF

COMPOSITE-OUTFLOW/EFFECTIVE COLD FRONT SHIFTING SSEWD TOWARDS THE

CENTRAL GULF COAST EARLY THIS EVENING GIVEN VERY MOIST AND MODESTLY

UNSTABLE AIR MASS.  DEEP LAYER SHEAR APPEARS SUFFICIENT FOR

SUPERCELLS AND SMALL LINES/BOWS AS MID LEVEL JET PERSISTS OVER THE

REGION.  PRIMARY SEVERE THREATS WILL BE FROM ISOLATED DAMAGING WINDS

AND LARGE HAIL.  HOWEVER...DISCRETE SUPERCELLS SHOULD SUPPORT AT

LEAST A RISK OF ISOLATED TORNADOES AHEAD OF THE FRONT WITH

MARGINALLY SUFFICIENT LOW LEVEL SHEAR FOR SUSTAINED LOW LEVEL

ROTATION.



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

SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24030.





...EVANS

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