EF3 tornado in McDonald County, Missouri

A storm survey concluded that an EF-3 tornado crossed into McDonald County from adjacent Delaware County, Oklahoma. The tornado crossed Stateline Road 2.8 miles north of Southwest City, Missouri at 7:26 pm and destroyed a single family resident and vehicles near the residence. The vehicles rolled up to 200 yards away from the house. Several trees were uprooted along the path of the tornado as it tracked southeast towards chicken houses near the intersection of Highway 43 and Farm Road 4385. The tornado lifted right before reaching Highway 43 about 2.2 miles north northeast of Southwest City. Maximum wind speeds were estimated between 150 and 160 mph. The maximum width of the path was estimated at a quarter of a mile wide.

A strong upper level trough across the central plains region and a strong upper level disturbance along with a frontal boundary in the area produced numerous severe storms with a few supercells across southeast Kansas. One cyclic supercell associated with the system produced a very large and deadly EF-5 tornado that hit the city of Joplin and then spawned two separate tornadoes that moved across southwestern Missouri. A separate tornadic supercell produced an EF-3 tornado that moved into McDonald County from Northeastern Oklahoma.

Continuing thunderstorms lasted into May 23 as another line of thunderstorms moved across the region. This line of storms produced reports of large hail, damaging winds and a weak EF-0 tornado in south central Missouri. As the storms moved over the Joplin area, two police officers were struck by lightning while aiding in the post tornado efforts. One of the two officers later died of injuries from the lightning strike.