Weather and Tornadoes for Minecraft 0.11
Description from the publisher
In terms of atmosphere, this mod adds a lot to the Minecraft world. Just wait for the weather to change from a bright sunny day to a mildly annoying rain and then to a giant F5 tornado picking up everything in the way and send it flying. If you want some more excitement and unpredictability you need to have this mod on your installation, just be careful to not be caught in the wind! And better, with Easy Installer, no configuration needed.