

000 

WWUS20 KWNS 171958

SEL2

SPC WW 171958

KSZ000-NEZ000-180300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 712

NWS STORM PREDICTION CENTER NORMAN OK

300 PM CDT WED OCT 17 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       CENTRAL KANSAS

       PARTS OF SOUTHERN NEBRASKA



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 300 PM UNTIL

1000 PM CDT.



HAIL TO 2 INCHES 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 65

STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF

KEARNEY NEBRASKA TO 45 MILES SOUTHWEST OF HUTCHINSON KANSAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 709...WW 710...WW 711...



DISCUSSION...THUNDERSTORMS DEVELOPING VICINITY OF DEEPENING SURFACE

LOW NRN KS AND EVENTUALLY SWD ALONG DRY LN INTO NWRN OK.  WITH STEEP

MID LEVEL LAPSE RATES AND 30-40KT OF SHEAR...A FEW SUPERCELLS ARE

LIKELY.  PRIMARY THREAT WILL BE LARGE HAIL AND LOCALLY DAMAGING

WINDS.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM

MOTION VECTOR 23025.





...HALES

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