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WWUS20 KWNS 201801

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SPC WW 201801

KSZ000-NEZ000-210100-



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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