https://apnews.com/fa13b8eb2d175bc33ef4b7009576cc5e

DENVER (AP) — A La Nina weather pattern, warm moist air coming from an unusually toasty Gulf of Mexico, likely juiced by climate change, and a decades long eastward shift of tornadoes came together to create the unusually early and deadly storm system that hit Alabama Thursday, meteorologists said.

And it may be the start of a bad tornado year, one expert worries.