A terrifying, historic supercell. It's not surprising, but all of the radar-based tornado intensity indicators, including a TDS up to 37,000 feet(!!!) and an accompanying debris plume suggest that a violent (EF4+) tornado impacted Mayfield, Kentucky this evening. pic.twitter.com/GNmH2J1iip

— Sam Emmerson (@ou_sams) December 11, 2021