NOTE: This article is under construction. The 2021 Chelsea-Independence tornado was an exceptionally wide, multiple-vortex EF5 tornado which tore through rural areas of southern Kansas in the late afternoon and early evening of May 16, 2021. While it impacted few structures, most of which sustained high-end EF4 to low-end EF5 damage, its peak intensity occurred over rural terrain where it killed two storm chasers, making it the second tornado known to cause the deaths of professional chasers.