CBC News, may 9, 2009
A severe thunderstorm swept through Mississauga, Brampton and Toronto on Saturday, bringing heavy rain, lightning and hail — some of it the size of ping-pong balls.
Ice pellets reportedly damaged cars and roofs in the north end of Toronto.
Along with the hail, wind gusts of up to 90 km/h were reported.
Hail can form as a result of strong updrafts in severe weather systems. A newly formed hailstone begins small but can grow as it meets a rising current of air and new drops of water cling to it.
Two weeks ago, a severe windstorm quickly swept through parts of southern Ontario, producing funnel clouds that toppled several trees.
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