Tornado counts are considered preliminary until final publication in the database of the National Centers for Environmental Information.
In addition, there can also be occasional increases in the southern and eastern United States as a result of tornadoes from landfalling tropical cyclones should such occur.
A secondary focal point lies in the Midwest and Great Lakes as a result of early-autumn frontal systems.
[4] The late summer and early fall brought near average activity, with the tropics a primary focus.
Simultaneous tornado activity also occurred in the Midwestern United States and Great Lakes region during that time.
[5] Another severe weather event happened on the last 2 days of the month producing multiple weak tornadoes.