June 20: Tornado Watch (Particularly Dangerous Situation)- East NE, North Central KS

URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 523
   NWS STORM PREDICTION CENTER NORMAN OK
   100 PM CDT MON JUN 20 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          PARTS OF NORTH CENTRAL KANSAS
          LARGE PART OF EASTERN NEBRASKA
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 800
   PM CDT.
   
   ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
   
   DESTRUCTIVE TORNADOES...LARGE HAIL TO 4 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 65 STATUTE
   MILES EAST AND WEST OF A LINE FROM 50 MILES EAST NORTHEAST OF
   ONEILL NEBRASKA TO 25 MILES SOUTH SOUTHEAST OF HILL CITY KANSAS. 
   FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
   OUTLINE UPDATE (WOUS64 KWNS WOU3).
   
   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 522...
   
   DISCUSSION...INTENSE SURFACE LOW OVER NCENTRAL KS WITH RAPID
   DESTABILIZATION OCCURRING  INTO NEB WHERE SHEAR IS VERY FAVORABLE
   FOR SUPERCELL DEVELOPMENT.  SUPERCELL THUNDERSTORMS WELL DEVELOP
   AHEAD OF THE TRACK OF THE LOW WITH POTENTIAL FOR STRONG TORNADOES
   INCREASING THRU THE AFTERNOON AS SYSTEM MOVES NNE.  VERY LARGE HAIL
   ALSO LIKELY GIVEN MLCAPES AOA 2500 J/KG AND LARGE HODOGRAPHS.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 4 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   550. MEAN STORM MOTION VECTOR 22030.