Tornado season is here again, with twisters striking in Indiana, Pennsylvania, and Florida over the past few weeks. But while severe storms in spring are nothing new, there have been subtle changes in tornado patterns in recent years that portend a more dangerous future for communities across the country.

According to a preliminary count from the National Centers for Environmental Information, there have been 547 tornadoes documented from January through April 2024. That figure is higher than the year-to-date average — 338 — the organization calculated between 1991 and 2020 but in line with the number observed in 2022 and 2023 in the same time frame.

And even as the number of tornadoes has stayed relatively consistent in the last few years, experts say there have been key changes in their behavior over time that could have major consequences.

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