Tornado outbreak of March 16–17, 1942

On March 16–17, 1942, a deadly late-winter tornado outbreak struck a large area of the Central and Southern United States, killing 149 people and injuring at least 1,312. At least five states reported violent tornadoes, from Illinois and Indiana south to Mississippi, beginning with an F4 tornado in the morning in Illinois. Intense activity spread south to the Gulf Coast and north to the Michigan–Indiana border as the day went on. Seven violent tornadoes were reported, one of which was a powerful F5 in Illinois. A long-tracked F4 tornado family in Mississippi claimed 63 lives as well, becoming the deadliest event of the outbreak. Another long-lived F4 in Tennessee killed 15 more people, and a series of intense tornadoes caused 24 other deaths in Kentucky. The outbreak also produced 18 tornadoes that caused at least one death—ranking eighth on a list of similar events since 1880 by tornado researcher Thomas P. Grazulis.

Confirmed tornadoes
Prior to 1990, there is a likely undercount of tornadoes, particularly E/F0–1, with reports of weaker tornadoes becoming more common as population increased. A sharp increase in the annual average E/F0–1 count by approximately 200 tornadoes was noted upon the implementation of NEXRAD Doppler weather radar in 1990–1991. 1974 marked the first year where significant tornado (E/F2+) counts became homogenous with contemporary values, attributed to the consistent implementation of Fujita scale assessments.

Avalon–Cascilla–Otoucalofa–Tula, Mississippi
This long-tracked tornado family caused at least 19 deaths in Leflore County as it leveled many small homes. Three of the fatalities occurred near Itta Bena and Greenwood. In Carroll County, the tornado caused five additional deaths near Avalon. The tornado also impacted and hurled a school bus for 50 yd; 11 children and the driver sustained injuries. As it traversed Grenada County, the tornado struck another school bus and killed a child. Nearby, the tornado obliterated a house and claimed three more lives. Three other people died in another home near Cascilla in Tallahatchie County. The tornado generated its worst damage in Otoucalofa, known then as O'Tuckalofa, near Water Valley. In this area, the tornado destroyed 10 mi2 of timber and killed 19 people, including the school superintendent, whose home and school were leveled and whose car was moved 300 yd. Northwest of Tula, five more deaths occurred, four of which took place in a single home. In all, the tornado injured 500 people and caused $600,000 in losses.

Barrville–Lacon, Illinois
This extremely violent tornado remains the most recent F5 or EF5 tornado on record in Central Illinois. It touched down east of Kickapoo and impacted areas near Alta and on the northwestern outskirts of Chillicothe. The tornado subsequently struck the settlement of Barrville, beside the Illinois River, before crossing the river to the south of Sparland. Near the river, the tornado caused one fatality. The tornado intensified to its peak intensity as it entered Lacon; although it bypassed the business district, the tornado destroyed a quarter of the town, which inclusively totaled about 60 homes, several of which were entirely swept away. Three deaths occurred in Lacon. About 3 mi farther on to the northeast, the tornado produced F5-level damage to a farmhouse and killed three people there. The tornado also lofted debris from Lacon for a total distance of up to 25 mi. Two schools in Lacon received extensive damage as well, and a home in town was uplifted and deposited in a neighboring yard. Along the entire path, about 70 injuries occurred, along with $600,000 in losses.