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Tornado Watch 82
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WW0082 Radar
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   SEL2
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 82
   NWS STORM PREDICTION CENTER NORMAN OK
   635 PM CDT FRI MAR 27 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHERN ARKANSAS
          NORTHWEST LOUISIANA
          NORTHEAST TEXAS
   
   EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 635 PM
   UNTIL 200 AM CDT.
   
   TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 95 STATUTE
   MILES EAST AND WEST OF A LINE FROM 15 MILES WEST NORTHWEST OF
   LITTLE ROCK ARKANSAS TO 50 MILES WEST SOUTHWEST OF NATCHITOCHES
   LOUISIANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
   
   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 78...WW 79...WW 80...WW
   81...
   
   DISCUSSION...POWERFUL UPPER TROUGH AND ASSOCIATED 70-80 MID LEVEL
   JET STREAK WILL CONTINUE TO SPREAD EAST ACROSS TX/OK AREAS THROUGH
   TONIGHT AND LEND SUPPORT TO DEEP SURFACE CYCLOGENESIS FROM THE
   ARKLATEX TO THE MS RIVER. AIR MASS AHEAD OF THIS PRONOUNCED SUPPORT
   FOR STRONG UPWARD MOTION WAS MOIST AND SUFFICIENTLY UNSTABLE TO
   SUPPORT ROBUST TSTM UPDRAFTS IN A REGIME CHARACTERIZED BY
   STRENGTHENING DEEP-LAYER SHEAR AND INTENSE MESOSCALE FORCING NEAR
   THE DEVELOPING LOW AND EWD ALONG WARM FRONT ACROSS SRN AR. CELLS
   SHOULD CONTINUE TO GAIN STRENGTH NEAR THESE FEATURES...AS WELL AS
   ALONG SURGING COLD FRONT NOW MOVING INTO ERN TX AND SERN OK. SHEAR
   AND FORCING WILL BE MORE THAN ADEQUATE FOR UPDRAFT ROTATION AND
   LONG-LIVED MESOCYCLONES. STORMS NEAR/EAST THE LOW CENTER...AND
   TRACKING ALONG THE FRONT ACROSS AR WILL EXPERIENCE GREATEST LOW
   LEVEL SHEAR AND HAVE THE POTENTIAL TO PRODUCE TORNADOES IN ADDITION
   TO VERY LARGE HAIL. LINEAR FORCING WITH THE COLD FRONT MAY PROMOTE
   EVENTUAL SQUALL LINE DEVELOPMENT WITH INCREASE IN WIDESPREAD WIND
   THREAT POSSIBLY DEVELOPING LATER TONIGHT.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 24030.
   
   
   ...CARBIN
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