2021 Tri-State tornado

Throughout the evening hours of December 10, 2021, a large and destructive tornado struck areas in and around the cities and communities of Monette and Leachville in Arkansas, Braggadocio and Hayti in Missouri, and Tiptonville and Samburg in Tennessee, killing eight people and injuring 16 others. The tornado was the second strongest and third deadliest of the tornado outbreak of December 10–11, 2021. The tornado reached peak intensity twice, the first time east of Braggadocio and the second time in Tiptonville, leading the National Weather Service to assign a rating of low-end EF4 on the Enhanced Fujita scale, with maximum wind speeds estimated at 170 mph (270 km/h).

Early estimates suggested that the tornado family—identified by some media outlets as a "quad-state tornado", due to the storm's long track extending into Kentucky and its similarity to the 219-mile (352 km) tri-state tornado of 1925—might have cut a path of up to 250 miles (400 km) across the affected areas, making it the longest-tracked tornado in history. However, storm surveys found that the majority of the storm's path consisted of two distinct EF4 tornadoes – the tri-state tornado and the western Kentucky tornado – with three short-lived and weak tornadoes in between them in northwestern Obion County, Tennessee. The parent supercell that produced the two EF4 tornadoes, and eleven tornadoes in total, later became known as the "quad-state supercell".