Tuesday, December 25, 2012

**PDS Tornado Watch For: LA/MS/AL**

Text from Storm Prediction Center


SEL5
 
   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.

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