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000 

WWUS20 KWNS 191828

SEL7

SPC WW 191828

IAZ000-KSZ000-MOZ000-NEZ000-200200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 577

NWS STORM PREDICTION CENTER NORMAN OK

130 PM CDT THU JUN 19 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF WESTERN IOWA

       NORTHEASTERN KANSAS

       PARTS OF NORTHERN AND WESTERN MISSOURI

       MUCH OF EASTERN NEBRASKA



EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 130 PM UNTIL

900 PM CDT.



HAIL TO 2.5 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 100

STATUTE MILES EITHER SIDE OF A LINE FROM 40 MILES NORTH NORTHWEST

OF TEKAMAH NEBRASKA TO 10 MILES SOUTHWEST OF KNOB NOSTER

MISSOURI.  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.



DISCUSSION...THUNDERSTORMS WILL INCREASE RAPIDLY IN NUMBER AND

INTENSITY ACROSS THE WATCH AREA AS A MODERATELY UNSTABLE AIR MASS IS

BECOMING UNCAPPED. WITH 30-40KT OF NWLY SHEAR...POTENTIAL FOR LARGE

HAIL AND WIND DAMAGE WILL INCREASE AS STORMS EVOLVE INTO SHORT LINE

SEGMENTS AND BOWS.



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

TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 30025.





...HALES

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