Thunderstorms developed during the late afternoon hours in Gray and Grant Counties in southwest Kansas and spread eastward into richer moisture and greater instability. Widespread severe thunderstorms continued through the evening hours and produced large hail and damaging winds. A downburst from a severe thunderstorm near Spearville caused extensive damage to sheds and trees on a farm about five miles south of Spearville.
A supercell thunderstorm formed in southeast Ford County around 730 PM and subsequently moved across Kiowa County. Several microbursts occurred in the vicinity of the mesocyclone with the supercell and produced damaging winds locally approaching 100 mph. Several center pivot irrigation systems were rolled; four high voltage transmission line towers were blown down northeast of Mullinville; two high voltage transmission line towers were blown down southwest of Greensburg; power poles were snapped; and several farms suffered damage to outbuildings and trees. A home weather station about 3 miles southwest of Greensburg measured a peak gust of 97 mph. All of the damage suggested a northeast wind. Hail up to the size of golfballs caused damage to crops.
Images of wind damage from severe thunderstorms on 16 June, 2011