April 25: Tornado Watch #3

URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 201
   NWS STORM PREDICTION CENTER NORMAN OK
   1100 AM CDT MON APR 25 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          WESTERN ARKANSAS
          SOUTHEAST OKLAHOMA
          NORTHEAST TEXAS
   
   EFFECTIVE THIS MONDAY MORNING AND EVENING FROM 1100 AM UNTIL 600
   PM CDT.
   
   TORNADOES...HAIL TO 3 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 105 STATUTE
   MILES EAST AND WEST OF A LINE FROM 5 MILES EAST SOUTHEAST OF
   CORSICANA TEXAS TO 20 MILES WEST NORTHWEST OF FORT SMITH
   ARKANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
   
   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 199...WW 200...
   
   DISCUSSION...THUNDERSTORMS ARE INTENSIFYING OVER NORTHEAST TX AND
   SOUTHEAST OK AS STRONG UPPER TROUGH APPROACHES FROM THE WEST.  A
   VERY MOIST AND MODERATELY UNSTABLE AIR MASS IS IN PLACE...WITH ONLY
   A WEAK CAP.  FAVORABLE LOW LEVEL AND DEEP LAYER VERTICAL
   SHEAR...COMBINED WITH PRESENCE OF SURFACE BOUNDARIES...WILL PROMOTE
   SUPERCELL THREAT.  DAMAGING WINDS...VERY LARGE HAIL...AND A FEW
   TORNADOES ARE ALL POSSIBLE THROUGH THE AFTERNOON IN THE WATCH AREA.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 25040.