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378 

WWUS20 KWNS 261031

SEL7

SPC WW 261031

ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-261800-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 17

NWS STORM PREDICTION CENTER NORMAN OK

420 AM CST THU JAN 26 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWEST ALABAMA

       WESTERN FLORIDA PANHANDLE

       SOUTHEAST LOUISIANA

       SOUTHEAST MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS THURSDAY MORNING FROM 420 AM UNTIL NOON CST.



TORNADOES...HAIL TO 1 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 80 STATUTE

MILES EAST AND WEST OF A LINE FROM 65 MILES WEST NORTHWEST OF

EVERGREEN ALABAMA TO 35 MILES SOUTHWEST OF BOOTHVILLE LOUISIANA.

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.



DISCUSSION...TSTMS ALONG REMNANT SSW-NNE PRE-FRONTAL OUTFLOW

BOUNDARY EXTENDING FROM THE GULF OF MEXICO THROUGH SE LA /JUST W OF

NEW ORLEANS/ INTO SRN MS EXPECTED TO INCREASE DURING THE NEXT

SEVERAL HOURS AS COLD FRONT OVERTAKES ACTIVITY.  ACCELERATION OF

COLD FRONT REFLECTS APPROACH OF SHORTWAVE TROUGH ATTENDANT TO

EJECTING NE TX UPR LOW. INCREASING LARGE SCALE ASCENT PROVIDED BY

THE TROUGH MAY ALSO FOSTER STORM DEVELOPMENT.

COMBINATION OF STRENGTHENING DEEP WIND FIELD...CONTINUED LOW LVL

MOISTURE INFLOW...AND...LATER THIS MORNING...SFC HEATING...COULD

SUPPORT BROKEN LINE SEGMENTS CONTAINING A FEW SUSTAINED

STORMS/SUPERCELLS.  IN ADDITION...A FEW DISCRETE STORMS/SUPERCELLS

MAY FORM IN CONFLUENT LOW LVL FLOW AHEAD OF THE FRONTAL LINE

SEGMENTS.  GIVEN RICH MOISTURE AVAILABILITY AND 40-50 KT 850-700 MB

FLOW...SETUP MAY YIELD LOCALLY DMGG WIND AND TORNADOES IN ADDITION

TO LOCALLY HEAVY RAIN.



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

SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND

GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.

MEAN STORM MOTION VECTOR 21035.





...CORFIDI

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