PDS Up. High-Risk of Tornadoes
Posted by JAC on 6/20/2011, 3:44 pm






  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.
 
 
  ...HALES
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Strong Tornado Risk for Nebraska Sunday - JAC, 6/18/2011, 3:42 pm
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