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Particularly Dangerous Situation (PDS) Tornado Watch 36
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   SEL6
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 36
   NWS STORM PREDICTION CENTER NORMAN OK
   210 PM CST TUE FEB 5 2008
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          CENTRAL AND SOUTHERN ARKANSAS
          NORTHERN LOUISIANA
   
   EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL
   1000 PM CST.
   
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
   
   DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 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 125 STATUTE
   MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST NORTHWEST OF
   EL DORADO ARKANSAS TO 50 MILES EAST OF PINE BLUFF ARKANSAS.  FOR
   A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU6).
   
   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 34...WW 35...
   
   DISCUSSION...SCATTERED THUNDERSTORMS ARE BEGINNING TO INTENSIFY FROM
   NE TX INTO WRN AR...AND ADDITIONAL CONVECTION IS FORMING ALONG A
   PRE-FRONTAL BAND NEAR MLU IN NRN LA.  18Z SOUNDINGS FROM LZK AND SHV
   SHOW THAT THE CAP HAS WEAKENED FROM BELOW VIA ASCENT...AND THIS
   TREND WILL CONTINUE THROUGH THE AFTERNOON IN CONJUNCTION WITH A LEAD
   SHORTWAVE TROUGH EJECTING NEWD FROM NE TX/ERN OK TOWARD AR.  THE
   COMBINATION OF MODERATE INSTABILITY...BOUNDARY LAYER DEWPOINTS IN
   THE MID 60S AND VERY STRONG VERTICAL SHEAR /EFFECTIVE SRH AOA 400
   M2/S2/ WILL SUPPORT A THREAT FOR LONG-LIVED SUPERCELLS CAPABLE OF
   PRODUCING STRONG TORNADOES...LARGE HAIL...AND DAMAGING WINDS INTO
   EARLY TONIGHT.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   450. MEAN STORM MOTION VECTOR 23050.
   
   
   ...THOMPSON
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