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903 

WWUS20 KWNS 092343

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SPC WW 092343

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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 405

NWS STORM PREDICTION CENTER NORMAN OK

640 PM CDT TUE JUL 9 2013



THE NWS STORM PREDICTION CENTER HAS ISSUED A



* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

  PARTS OF CENTRAL AND EASTERN KANSAS

  SOUTH CENTRAL AND SOUTHEAST NEBRASKA



* EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 640 PM

  UNTIL 100 AM CDT.



* PRIMARY THREATS INCLUDE...

  SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2

    INCHES IN DIAMETER POSSIBLE

  SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES NORTH OF

HILL CITY KANSAS TO 25 MILES NORTH OF TOPEKA KANSAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU5).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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 404...



DISCUSSION...TWO CLUSTERS OF THUNDERSTORMS -- ONE ACROSS SOUTH

CENTRAL NEBRASKA AND A SECOND/LARGER CLUSTER OVER PARTS OF WESTERN

AND CENTRAL KANSAS -- HAVE DEVELOPED THIS AFTERNOON...WITHIN AN

ENVIRONMENT CHARACTERIZED BY MODERATE WEST-NORTHWESTERLY MID-LEVEL

FLOW AND MODERATE INSTABILITY.  SEVERE THREAT HAS REMAINED ISOLATED

THUS FAR...BUT HINTS THAT SOME UPSCALE CONVECTIVE GROWTH DURING THE

EVENING IS POSSIBLE -- AIDED BY A DEVELOPING SOUTHWESTERLY LOW-LEVEL

JET -- SUGGEST SOME THREAT FOR MORE WIDESPREAD WIND DAMAGE

EVENTUALLY DEVELOPING/SPREADING EAST-SOUTHEAST TOWARD THE MID MO

VALLEY THROUGH THE EVENING HOURS.



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 500. MEAN STORM

MOTION VECTOR 29030.





...GOSS

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