| Comments | Ottawa, Toronto and Windsor ON, April 25, 2009. A spate of fierce thunderstorms broke out across southwestern, southcentral and eastern Ontario. Winds at Toronto Pearson International Airport gusted to 115 km/h, the strongest wind gusts reported since January 1978. Power lines and trees came down across the province, knocking out power to 100,000 customers (300,000 individuals). Embedded in the thunderstorm cluster were marble-sized hail near Parry Sound, waterspouts in the Ottawa River, straight-line winds and weak tornados in Windsor and Ottawa. In Windsor, the roof was ripped off a union hall building with chunks of roofing and shards of glass littering the lawn and front steps. At Ottawa's Rockcliffe Flying Club, winds damaged 18 planes. Both tornados were F0 in intensity with winds of up to 110 km/h. |