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106 

WWUS20 KWNS 182306

SEL6

SPC WW 182306

KSZ000-MOZ000-OKZ000-190700-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 506

NWS STORM PREDICTION CENTER NORMAN OK

605 PM CDT SAT JUN 18 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHERN AND EASTERN KANSAS

       WEST CENTRAL AND SOUTHWEST MISSOURI

       NORTHERN OKLAHOMA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 605 PM

UNTIL 200 AM CDT.



HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 105

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

NORTHEAST OF OLATHE KANSAS TO 20 MILES SOUTHEAST OF BARTLESVILLE

OKLAHOMA.  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 501...WW 502...WW

503...WW 504...WW 505...



DISCUSSION...TSTMS EXPECTED TO INCREASE MARKEDLY IN

COVERAGE/STRENGTH ACROSS WW DURING THE NEXT SEVERAL HOURS IN NERN

QUADRANT OF THERMALLY ENHANCED SFC LOW OVER N CNTRL OK.  DEVELOPMENT

MAY BE MOST FOCUSED ALONG DIFFUSE BOUNDARY ARCING NEWD FROM N OF LOW

INTO W CNTRL MO.  AMPLE DEEP WSWLY SHEAR WILL EXIST FOR SUSTAINED

SUPERCELLS GIVEN DEGREE OF INSTABILITY /SBCAPE AOA 4000 J PER KG/.

POTENTIAL ALSO WILL EXIST FOR A TORNADO OR TWO...MAINLY DURING

EARLIER STAGES OF STORM EVOLUTION IN S CNTRL KS/FAR NRN OK.  THE

STORMS SHOULD MERGE INTO ONE OR MORE LOOSELY-ORGANIZED MCSS THAT

MOVE GENERALLY E LATER TONIGHT...WITH EMBEDDED BOWING SEGMENTS

POSING A RISK FOR MAINLY DMGG WIND.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. MEAN STORM

MOTION VECTOR 28025.





...CORFIDI

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