Satellite images show the path of powerful storm systems that moved through south-central United States between May 19 and May 20, 2013.
Canadians advised to prepare for tornadoes despite lower risk than U.S.
Severe thunderstorms in parts of southern Ontario
Crews wrap up search for Oklahoma tornado survivors
To see nature's wildest outbursts from a unique perspective, watch Angry Planet on The Weather Network tonight at 7pm & 10pm.
A typical thunderstorm is about 15 miles in radius and lasts for approximately half an hour. Lightning from a thunderstorm can be witnessed as far as 10 miles away outside its radius.
Storm
Massive tornado leaves a devastating path across Oklahoma City. Tune in to The Weather Network TV for continued live coverage.
