EF0 tornado in Lincoln County, South Dakota

A storm chaser reported the tornado was first visible in an open field west of 466th Avenue and north of 291st Street. The tornado moved slowly southeast toward a farmstead at the intersection of 466th Avenue and 291st Street where minor tree damage was reported. The primary circulation then broadened as the tornado turned more eastward and at times exhibited smaller brief vortices. Additional minor tree damage occurred before the tornado lifted in the vicinity of 291st Street and 467th Avenue. The tornado was rated EF0 with an estimated peak wind of 75 mph and an estimated average path width of 50 yards.

A trough lifted through the western High Plains as a weak convergence boundary drifted eastward into southeast South Dakota during the late afternoon. Near the boundary, a diurnally destabilized air mass focused convective development in a fairly weak shear environment across the lower James River Valley. Thunderstorms largely produced large hail up to ping-pong ball size during periods of stronger updrafts within the storm clusters. Shear concentrated in lower levels and storm interactions combined to produce several brief tornadoes in southeast South Dakota. Slow moving storms also produced spotty heavy rainfall, some of which that fell on areas that received heavy rainfall west of Sioux Falls in the previous night.