EF1 tornado in Bollinger County, Missouri

The tornado crossed into Bollinger County from Wayne County. The tornado directly affected the community of Zalma, where the school gymnasium roof was damaged. Air conditioning units were blown off the school roof. The top half of a two-story barn was destroyed. There was roof damage to a chicken house. Otherwise, the majority of the path was through densely wooded farm country, where numerous trees were uprooted or snapped. Peak winds were estimated near 105 mph.

The severe weather episode began as a series of supercells and transitioned to a squall line. A supercell thunderstorm produced a strong long-track tornado across southeast Missouri that ended in southwest Perry County. A short EF-1 tornado associated with a squall line struck southern Perry County shortly thereafter. A longer track EF-1 tornado also impacted eastern Wayne County into southern Bollinger County. The storms preceded a strong cold front that trailed south-southwest from a low pressure center over west central Illinois. Dew points ahead of the front were in the lower to mid 60's. Instability was strong enough to support severe storms, given that wind shear was quite strong. Mixed-layer capes were around 1000 j/kg.