I’ve found out that naturally spawned tornadoes don’t die after a certain amount of time, or they take a really long time to die (but I haven’t seen one die yet). I know the mod is still in development and maybe this issue has already been reported, but I just wanted to point it out. Maybe add a despawn timer to tornadoes (make it like 10 minutes or something) regardless if it is in render distance or not. It would be really cool to see a tornado lift, instead of it just despawnimg outside my render distance.

Tornadoes have stages up to 4, and they will despawn once there out of range of players view distance or in unloaded chunks, problem is different stages don't change size as much like on 1.12.2, weather radar is useless but that's yet to be implemented

They can last a really long time but do eventually despawn.