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WWUS20 KWNS 182100

SEL0

SPC WW 182100

ALZ000-FLZ000-GAZ000-CWZ000-190300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 30

NWS STORM PREDICTION CENTER NORMAN OK

300 PM CST SAT FEB 18 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHEAST ALABAMA

       FLORIDA PANHANDLE

       SOUTHWEST GEORGIA

       COASTAL WATERS



EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 300 PM UNTIL

900 PM CST.



TORNADOES...HAIL TO 1.5 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 70 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 40 MILES EAST SOUTHEAST OF

MARIANNA FLORIDA TO 40 MILES NORTHWEST OF PANAMA CITY FLORIDA.

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 28...WW 29...



DISCUSSION...BROKEN QUASI-LINEAR MCS CURRENTLY ACROSS SOUTHEAST

LA/MS SHOULD CONTINUE EAST AT UP TO 50KT ALONG A W-E WARM FRONT

SITUATED JUST INLAND FROM THE GULF COAST. THIS MCS LEADS A POTENT

UPR SHORTWAVE TROUGH THAT WAS DRIVING SURFACE CYCLOGENESIS OVER THE

NWRN GULF ATTM. LOCAL/STORM SCALE FORCING WITH THE LEADING SYSTEM

WILL ACT ON MARGINALLY UNSTABLE AIR MASS ACROSS PORTIONS OF THE

WATCH AREA OVER THE NEXT FEW HOURS TO SUPPORT A CHANCE FOR DAMAGING

WINDS AND PERHAPS A COUPLE OF TORNADOES. SEVERE WEATHER THREAT MAY

PERSIST  BEYOND THIS INITIAL ACTIVITY AND INTO THE NIGHT AS THE

SURFACE LOW DEEPENS AND MOVES ENEWD FROM THE GULF TO SRN/CNTRL AL

LATE TONIGHT AND COLD FRONT MOVES EAST...PERHAPS PRECEDED BY STRONG

TO SEVERE STORMS IN THE FORM OF A SQUALL LINE.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

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

500. MEAN STORM MOTION VECTOR 24035.





...CARBIN

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