Oklahoma Tornadoes

There has been a huge tornado in Oklahoma, part of a series of large twisters this month. Though relative to a tropical storm the area covered is more narrow, the damage from the hazard of strong winds is very severe with winds thought to have reached 200mph. At least 2 people died and 21 were injured on Sunday. The storm has been classified as EF-4 on the enhanced fujita scale. You can see how tornadoes form and 2 storify versions of the event below:

Animated guide to Tornadoes