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267 

WWUS20 KWNS 210851

SEL5

SPC WW 210851

IAZ000-KSZ000-MOZ000-NEZ000-211600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 365

NWS STORM PREDICTION CENTER NORMAN OK

345 AM CDT MON JUN 21 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHWEST IOWA

       NORTHERN KANSAS

       FAR NORTHWEST MISSOURI

       SOUTH CENTRAL AND SOUTHEAST NEBRASKA



EFFECTIVE THIS MONDAY MORNING FROM 345 AM UNTIL 1100 AM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 110

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF

LINCOLN NEBRASKA TO 35 MILES SOUTHWEST OF CONCORDIA KANSAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU5).



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 362...WW 363...



DISCUSSION...TSTMS IN S CNTRL NEB APPEARS TO BE EVOLVING INTO A

FORWARD-PROPAGATING SYSTEM.  GIVEN STRENGTH OF DEEP SHEAR/PRESENCE

OF 40+ KT WSWLY MID LVL UPR JET...AND STRONG/BROAD/MOIST SSWLY

LLJ...SETUP MAY SUPPORT DEVELOPMENT OF A BOW MCS WITH AN INCREASED

RISK FOR DMGG WIND/SVR HAIL.  OTHER SVR STORMS MAY DEVELOP WITHIN

W/E BAND OF WAA CONVECTION EXTENDING E TO NEAR KOMA.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 27035.





...CORFIDI

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