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738 

WWUS20 KWNS 030400

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KSZ000-NEZ000-031000-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 587

NWS STORM PREDICTION CENTER NORMAN OK

1100 PM CDT SAT JUL 2 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       A LARGE PORTION OF KANSAS

       SOUTH CENTRAL AND SOUTHEASTERN NEBRASKA



EFFECTIVE THIS SATURDAY NIGHT AND SUNDAY MORNING FROM 1100 PM

UNTIL 500 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 75

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 85

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 10 MILES SOUTH

SOUTHWEST OF HILL CITY KANSAS TO 40 MILES NORTH NORTHEAST OF

EMPORIA KANSAS.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 585...WW 586...



DISCUSSION...WELL-DEFINED MCV HAS EVOLVED -- NOW OVER NWRN KS...WITH

A CLUSTER OF STRONG TO SEVERE STORMS ON THE LEADING EDGE.  SLY

LOW-LEVEL JET AND ASSOCIATED WARM ADVECTION CONTINUE TO

INCREASE...WHICH SHOULD SUPPORT A CONTINUATION OF THE EWD-MOVING MCS

THROUGH THE AXIS OF MODERATE INSTABILITY LYING W-E ACROSS THE NRN

HALF OF KS AND ADJACENT SRN NEB NEAR AND N OF THE MAIN W-E SURFACE

FRONT.  GIVEN THE WELL-ORGANIZED NATURE OF THE CONVECTIVE

SYSTEM...LOCALLY SUBSTANTIAL DAMAGING WINDS WILL BE POSSIBLE IN

ADDITION TO LARGE HAIL...WITH SOME POTENTIAL FOR A SLIGHT ESEWD TURN

WITH THE MCS WITH TIME AS THE LOW-LEVEL JET -- AND ASSOCIATED SLY

INFLOW INTO THE SYSTEM -- CONTINUES TO INTENSIFY.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65

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

MOTION VECTOR 29035.





...GOSS

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