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Tornado Watch 34
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WW0034 Radar
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   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 34
   NWS STORM PREDICTION CENTER NORMAN OK
   1200 PM CST TUE FEB 5 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHWEST ARKANSAS
          SOUTHEAST OKLAHOMA
          NORTHEAST TEXAS
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM NOON UNTIL 700
   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 85 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 45 MILES WEST NORTHWEST OF
   PARIS TEXAS TO 20 MILES EAST OF DE QUEEN ARKANSAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU4).
   
   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...CONVECTION IS BEGINNING TO DEEPEN ALONG THE DRYLINE IN
   N TX/SRN OK...AS WELL AS ALONG A PRE-FRONTAL BAND FROM NE TX INTO SE
   OK.  THE PRE-FRONTAL BAND IS ASSOCIATED WITH A LEAD SHORTWAVE TROUGH
   AND THE W EDGE OF THE STRONGER CAP...AND THIS ZONE OF ASCENT WILL
   LIKELY SPREAD NEWD TOWARD SW/WRN AR THIS AFTERNOON.  GIVEN THE
   PRESENCE OF 0-6 KM SHEAR IN EXCESS OF 60 KT...0-1 KM SRH NEAR 200
   M2/S2...BOUNDARY LAYER DEWPOINTS IN THE LOW 60S...AND MLCAPE NEAR
   1000 J/KG...A FEW SUPERCELLS WITH TORNADOES WILL BE POSSIBLE.  LARGE
   HAIL AND DAMAGING WINDS CAN ALSO BE EXPECTED WITH THE STRONGER
   STORMS.
   
   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
   450. MEAN STORM MOTION VECTOR 23045.
   
   
   ...THOMPSON
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Page last modified: February 05, 2008
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