The year’s first deadly US tornado struck after dark Thursday, killing two people in a small East Tennessee community as the first of five back-to-back, jet stream-driven winter storms pummeled the eastern United States.

Two people are dead in Morgan County, Tenn., after a tornado swept through the area on Thursday, Feb. 6. Here's what we know so far.

The tornadoes, which also injured three people and caused widespread damage, reached wind speeds in excess of 100 miles per hour.