As there were no confirmed EF-4 Tornadoes in the United States in the calendar year of 2018, this marks the strongest tornado to touch down anywhere in the United States since the Canton Texas tornado of April 29th, 2017.
Pretty remarkable for an ENH risk day with a lot of factors working against it -- I know a lot of weather friends of mine weren't even really watching the day until it was obvious that something big was happening. Sad that it hit so suddenly and in an area where it caused so many deaths.