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Is the Shift in Tornado Alley Related to Climate Change?

From year to year there may be a stark contrast in where severe weather strikes, especially thunderstorms that produce tornadoes.

The airport in London, Kentucky, is heavily damaged by tornado. [Shutterstock]
Gemini Sparkle

Key Takeaways:

  • Climate change is driving an increase in significant severe weather events, including tornadoes, in the Deep South (Louisiana, Mississippi, and Alabama).
  • Traditional "Tornado Alley" is expanding eastward, leading to more supercell thunderstorm development and destructive tornadoes in the Lower Mississippi Valley, Ozarks, mid-South, and Tennessee Valley.
  • This eastward expansion of tornado environments significantly increases the exposure and vulnerability of populations in these regions to more impactful tornado events.
  • Staying weather aware and utilizing resources from the Storm Prediction Center (SPC) for convective outlooks and warnings is crucial for safety.
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Question: It seems there have been more significant severe weather events that include tornadoes happening in the Deep South, especially in Louisiana, Mississippi, and Alabama rather than in the traditional location of Tornado Alley. Is this driven by climate change?  

Answer: The short answer is yes. Tornado Alley has had a bad reputation over the last couple of decades, however. Although there has never been an official designation of where Tornado Alley is located, it is the area that is roughly approximated by the central and southern Plains from Nebraska to north-central Texas. 

There has been some debate that Tornado Alley has been shifting to the east over the last couple of decades. But it is more likely that Tornado Alley isn’t shifting but rather expanding to the east. 

Scott Dennstaedt, Ph.D

Scott resides in Charlotte, North Carolina, and flies regularly throughout the Mid-Atlantic and Southeast U.S. He is a CFI and former NWS meteorologist. Scott is the author of "The Skew-T log (p) and Me: A Primer for Pilots" and the founder of EZWxBrief.

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