

000 

WWUS20 KWNS 300340

SEL6

SPC WW 300340

KSZ000-NEZ000-300900-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 696

NWS STORM PREDICTION CENTER NORMAN OK

1040 PM CDT SAT SEP 29 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTH CENTRAL KANSAS

       CENTRAL NEBRASKA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1040 PM

UNTIL 400 AM CDT.



HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 45

STATUTE MILES EAST AND WEST OF A LINE FROM 30 MILES NORTH OF

ONEILL NEBRASKA TO 20 MILES SOUTHWEST OF HILL CITY KANSAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 694...WW 695...



DISCUSSION...SEVERAL THUNDERSTORM CLUSTERS/BOW ECHOES FROM NW KS

INTO SW/CENTRAL NEB MAY PERSIST FOR ANOTHER FEW HOURS...WITH

WEAKENING EXPECTED LATER TONIGHT AS CONVECTION PROGRESSES E OF THE

MOISTURE/INSTABILITY AXIS.  PRIOR TO THE WEAKENING OF THE

STORMS...DAMAGING WINDS WILL CONTINUE TO BE A THREAT IN CONJUNCTION

WITH STORM DOWNDRAFTS AND 50+ KT FLOW JUST ABOVE THE SURFACE.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.

A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION

VECTOR 24040.





...THOMPSON

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