National Weather Service United States Department of Commerce


Multiple rounds of severe thunderstorms brought damaging straight-line winds, large hail, tornadoes, and flooding to the Missouri Ozarks and southeastern Kansas from May 27th into the early morning hours of May 28th. Over 130 reports of severe weather and flooding were received from the Missouri Ozarks and southeastern Kansas alone. This severe weather outbreak stretched from Kansas and Oklahoma, east into the southern Appalachians with well over 700 reports of severe weather.

Some of the main highlights across the Missouri Ozarks included:

  • Five confirmed tornadoes
  • Numerous reports of quarter to golf ball sized hail with some reports of hail as large as tennis balls
  • Large amounts of tree damage and some structural damage due to straight-line winds
  • Significant flash flooding in the Branson area

This severe weather outbreak was the result of extreme amounts of instability in the atmosphere combined with strong wind shear. This type of volatile atmosphere resulted in multiple thunderstorm line segments which produced straight-line winds over 70 mph at times, along with embedded tornadoes. Supercell thunderstorms also developed and were responsible for the very large hail.


Summary of Tornado (Red), Wind (Blue), and Hail (Green) Reports from the Storm Prediction Center for 27 May 2017
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