Pick a good one or just learn about history. I see a good one from a long time ago for Carl. 

https://en.wikipedia.org/wiki/May_4

2007 – Greensburg, Kansas is almost completely destroyed by a 1.7 mi wide EF5 tornado. It was the first-ever tornado to be rated as such with the new Enhanced Fujita scale.

https://en.wikipedia.org/wiki/Greensburg,_Kansas

Greensburg is a city in, and the county seat of, Kiowa County, Kansas, United States.^[1]  As of the 2010 census, the city population was 777,^[5] and before the tornado, in 2000 the population was 1,544.

City center, twelve days after the tornado struck (2007)