@ktvu2: A deadly tornado that killed three people in Enderlin, North Dakota, on June 20 was a rare EF-5 storm, the National Weather Service (NWS) announced on October 5. The last known EF-5 tornado in the US was recorded in 2013. Video from Eric Schultz shows the massive tornado towering above houses and silos as a siren rings out. Credit: Eric Schultz via Storyful