An EF5 tornado struck North Dakota this year, the National Weather Service confirmed Monday, marking the first tornado of that strength in more than a decade on American soil. The incredibly strong twister touched down in Enderlin, North Dakota on June 20, the NWS wrote in an advisory released on Oct. 6, using data gathered from the tornado's path in the nearly four months since it passed. MORE: https://www.wthr.com/article/news/nation-world/north-dakota-tornado-june-upgraded-first-ef5-since-2013-national-weather-service/507-e1e671a6-cbaa-40e0-ac5c-188a333ae705