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Tornado Watch 17
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WW0017 Radar
Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
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   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 17
   NWS STORM PREDICTION CENTER NORMAN OK
   210 PM CST MON FEB 12 2007
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN AND CENTRAL LOUISIANA
          SOUTHEAST TEXAS
          COASTAL WATERS
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
   1100 PM CST.
   
   TORNADOES...HAIL TO 2 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 60 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 10 MILES NORTH OF HOUSTON
   TEXAS TO 25 MILES NORTH NORTHEAST OF LAFAYETTE 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.
   
   OTHER WATCH INFORMATION...CONTINUE...WW 16...
   
   DISCUSSION...TSTMS HAVE BECOME SLIGHTLY MORE DISCRETE IN THE PAST
   1-2 HRS ALONG SRN END OF CONVECTIVE BAND OVER E TX/FAR WRN LA. 
   POTENTIAL FOR DISCRETE OR NEAR-DISCRETE SFC-BASED STORMS SHOULD
   CONTINUE TO SLOWLY INCREASE OVER FAR SE TX/SRN LA OVER THROUGH MID
   EVENING AS /1/ BOUNDARY LAYER CONTINUES TO MOISTEN AND /2/ REGION IS
   GLANCED BY 50 KT MID LEVEL WSWLY SPEED MAX ASSOCIATED WITH NW TX UPR
   TROUGH.  GIVEN BACKED LOW LEVEL FLOW INVOF CONVECTIVE BAND AND
   INCREASING MOISTURE AVAILABILITY...A THREAT MAY DEVELOP FOR
   TORNADOES THROUGH LATE TONIGHT.
   
   AVIATION...TORNADOES AND 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
   400. MEAN STORM MOTION VECTOR 24030.
   
   
   ...CORFIDI
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Page last modified: February 13, 2007
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