Isn't it a bit early for tornadoes?

Tornadoes Kill at Least 23 in Lee County, Alabama

At least 23 people have been killed as tornadoes struck Lee County in eastern Alabama, authorities say.

County Sheriff Jay Jones said there had been "catastrophic" damage and there were fears more bodies would be found. Dozens are thought to have been hurt. 

Rescue efforts have been halted until dawn due to the danger of searching in the dark.

The most devastating tornadoes struck the area around Beauregard, carving a path at least half a mile wide.

https://www.bbc.com/news/world-us-canada-47436809