Fall is known for its cool mornings, mild afternoons, and beautiful fall colors. But fall is also known for severe weather.
This is because, like spring, fall is a transition season. During the transition, the jet stream is moving from its summertime home in Canada farther south to its wintertime home in the United States. This shift in the jet stream pattern brings stronger storm systems through the Ozarks.
While fall severe weather records don't come close to springtime levels, there is a noticeable uptick in severe weather activity and tornadoes in September, October, and November.
For example, Missouri averages 2 tornadoes in July and 1 tornado in August. The average climbs to 2 in September and 3 in October. This is a very small rise in activity, but it's still a rise. In Arkansas,