

000 

WWUS20 KWNS 112009

SEL9

SPC WW 112009

ALZ000-MSZ000-120200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 199

NWS STORM PREDICTION CENTER NORMAN OK

310 PM CDT FRI APR 11 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ALABAMA

       SOUTHERN AND EAST-CENTRAL MISSISSIPPI



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 310 PM UNTIL 900

PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 115

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTHEAST OF

CENTREVILLE ALABAMA TO 35 MILES EAST SOUTHEAST OF MC COMB

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 196...WW 197...WW 198...



DISCUSSION...SVR TSTMS LIKELY TO CONTINUE FORMING AND MOVING

ENEWD-NEWD...AHEAD OF PREFRONTAL WIND SHIFT/CONVERGENCE BOUNDARY

MOVING EWD ACROSS CENTRAL/SWRN MS AS OF 20Z.  WHILE SOME TORNADO

POTENTIAL EXISTS WITH ISOLATED SWRN MS TSTM INTERACTING WITH

BOUNDARY...PRIND PREDOMINANT THREATS ACROSS BULK OF WW AREA WILL BE

LARGE HAIL AND DAMAGING GUSTS...IN ENVIRONMENT OF FAVORABLE

INSTABILITY BUT SOMEWHAT VEERED SFC WINDS.



AVIATION...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 25035.





...EDWARDS/THOMPSON

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