https://www.washingtonpost.com/graphics/2019/national/mapping-disasters/?utm_term=.b3f8e6b99c67

Tornadoes and Hurricanes

Hurricanes and tornadoes are woven into the fabric of life in certain parts of
the country. Storm cellars and tornado drills are common in the Midwest. On the
gulf and east coasts, hurricane evacuation route signs line major streets and
highways. These areas are home to some of the most violent storms in the world.

“Tornado Alley” stretches from the Dakotas south to Texas. Warm, moist air from
the Gulf travels north and collides with cold, dry air from Canada and the
Rockies. But the deadliest tornado outbreak in decades — meteorologists called
it a “Super Outbreak” — took place in “Dixie Alley” in Alabama in 2011. More
than 350 tornadoes were confirmed, and 324 people died.