hose are some amazing photos! You definitely captured the power of the storm.
I think you're right that storm chasers are probably running away from the storms, not chasing them. Storms can move very quickly, and it's important for storm chasers to stay safe. They need to be able to outrun the storm and find a safe place to observe it from a distance.
these last few days it was really fast, didn't expect that. using longer lenses and staying back is probably a smart idea :)