EF0 tornado in Minnehaha County, South Dakota

A tornado touched down in an open field southwest of the intersection of 266th Street and 459th Avenue. The tornado moved to the east-northeast for around one minute crossing 459th Avenue and impacting a farmstead where it damaged two barns, downed several large tree limbs, and a fence. The tornado turned a bit more northeast across 266th Street before lifting in an open field to the north. The tornado was rated EF0 with an estimated peak wind of 80 mph and an estimated average path width of 40 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.