Wednesday marks two-year anniversary of deadly tornado in Joplin, Missouri
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Severe thunderstorm watches issued in southern Ontario
Environment Canada confirms Ontario's second tornado of 2013
Tornado victim finds lost dog on live TV
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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
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