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128 

WWUS20 KWNS 220603

SEL8

SPC WW 220603

IAZ000-KSZ000-MOZ000-NEZ000-221300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 378

NWS STORM PREDICTION CENTER NORMAN OK

105 AM CDT TUE JUN 22 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       WESTERN IOWA

       NORTHERN KANSAS

       FAR NORTHWEST MISSOURI

       EASTERN AND SOUTHERN NEBRASKA



EFFECTIVE THIS TUESDAY MORNING FROM 105 AM UNTIL 800 AM 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 80

STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES NORTHWEST

OF HASTINGS NEBRASKA TO 80 MILES EAST NORTHEAST OF SHENANDOAH

IOWA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 371...WW 374...WW

375...WW 376...WW 377...



DISCUSSION...PERSISTENT WAA AND MOISTURE INFLOW INVOF WEAK W/E FRONT

EXPECTED TO SUPPORT ADDITIONAL STRONG/SVR TSTM DEVELOPMENT OVER THE

LWR MO VLY THROUGH 12Z.  EVOLUTION INTO A FORWARD-PROPAGATING MCS

WITH EMBEDDED BOWING SEGMENTS WILL BE POSSIBLE GIVEN CONTINUING

PRESENCE OF EML AND HI PW.



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 27025.





...CORFIDI

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