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000 

WWUS20 KWNS 081834

SEL9

SPC WW 081834

IAZ000-KSZ000-MOZ000-NEZ000-090100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 489

NWS STORM PREDICTION CENTER NORMAN OK

135 PM CDT SUN JUN 8 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EXTREME SOUTHWEST IOWA

       NORTHEAST AND EAST CENTRAL KANSAS

       NORTHWEST MISSOURI

       EXTREME SOUTHEAST NEBRASKA



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 135 PM UNTIL 800

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 50

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

NORTHWEST OF LAMONI IOWA TO 5 MILES SOUTHEAST OF EMPORIA KANSAS.

FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 485...WW 486...WW

487...WW 488...



DISCUSSION...THUNDERSTORMS WILL CONTINUE TO INTENSIFY ALONG SURFACE

COLD FRONT OVER EASTERN KS...SPREADING EASTWARD ACROSS THE WATCH

AREA THIS AFTERNOON.  SUPERCELL STRUCTURES ARE EXPECTED...ALTHOUGH

LINEAR FORCING MECHANISMS AND VEERED LOW LEVEL WINDS SUGGEST

DAMAGING WINDS AND HAIL ARE THE MAIN THREATS.



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 24030.





...HART

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