EF1 tornado in Cherokee County, Kansas

A National Weather Service storm survey determined that an EF-1 tornado with maximum winds of 100 mph touched down just west of the Missouri state line and traveled a half mile to the northeast before passing into Missouri. As it crossed the border the storm intensified to an EF3 with an estimated 140 mph winds. This tornado was produced by the supercell that spawned the Treece tornado and continued to produce funnel clouds very near the ground through Riverton and the north Galena area before the tornado touched down near Woodchuck Drive and caused roof damage to two homes and downed several trees as it crossed into Missouri along SE 118th Street.

Multiple rounds of storms producing heavy rainfall, severe winds, hail and tornadoes moved across Southeastern Kansas and into the Missouri Ozarks from May 20th through May 22th as upper level disturbances interacted with a slow moving but powerful storm system over the Central Plains. Tornadoes occurred with each round, with the strongest and most numerous tornadoes occurring during the late afternoon and evening of the 22nd. The cumulative rainfall caused areas of flash flooding with some flooding lingering across the region. Some locations in southeastern Kansas and southwestern Missouri reported in excess of 8 inches of rainfall over the 72 hour period.