Spring draws much of the attention when it comes to damaging tornadoes, but as Sunday night's destructive tornadoes and storms in the South show, fall is also notorious for an uptick in tornado activity.
The Dallas metro area suffered major tornado damage Sunday night, and parts of Arkansas, Louisiana, Missouri, Oklahoma and Tennessee saw damaging severe storms as well.Although it may seem unusual, October is the 3rd most tornadic month of the year in Dallas County. Not including Sunday night, there are 11 confirmed tornadoes in Dallas County during the month of October (1880-2018), according to the National Weather Service. Only April (23) and May (24) have had more tornadoes there.
The atmosphere can become unstable in the fall as cold fronts and jet stream winds become stronger and interact with warm, moist air. That allows severe thunderstorms with damaging winds, large hail, and sometimes tornadoes, to develop.
Most of the time, the second-season tornado outbreaks happen in the South where warm and moist air is more common, but they can sometimes spread farther north.
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