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WWUS20 KWNS 251857

SEL5

SPC WW 251857

ALZ000-LAZ000-MSZ000-CWZ000-260200-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 695

NWS STORM PREDICTION CENTER NORMAN OK

1255 PM CST TUE DEC 25 2012



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTHWESTERN AND WEST-CENTRAL ALABAMA

       EASTERN AND SOUTHEASTERN LOUISIANA

       CENTRAL AND SOUTHERN MISSISSIPPI

       COASTAL WATERS



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 1255 PM UNTIL

800 PM CST.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 1.5 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE

POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 125 STATUTE

MILES EAST AND WEST OF A LINE FROM 25 MILES SOUTHWEST OF

BOOTHVILLE LOUISIANA TO 40 MILES NORTHEAST OF JACKSON

MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 692. WATCH NUMBER 692 WILL NOT BE IN EFFECT AFTER

1255 PM CST. CONTINUE...WW 693...WW 694...



DISCUSSION...WARM SECTOR SPREADING INLAND ACROSS WW AREA WILL BECOME

INCREASINGLY JUXTAPOSED WITH STRENGTHENING DEEP SHEAR AND ENLARGED

LOW-LEVEL HODOGRAPHS.  MCS MOVING EWD INTO THIS REGIME WILL

ENCOUNTER MLCAPE 500-1500 J/KG...WITH EFFECTIVE SRH MAXIMIZED NEAR

WARM FRONT AT 400-600 J/KG.  ANY RELATIVELY SUSTAINED/DISCRETE

SUPERCELLS WILL OFFER RISK OF LONG-TRACKED/DAMAGING TORNADOES.

DAMAGING GUSTS AND OCNL TORNADOES ARE ALSO LIKELY FROM QLCS/LEW/BOW

STRUCTURES.



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

SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 24040.





...EDWARDS

