Third tornado confirmed in wild Ontario storm

Damaged trees are seen following a storm in Cambridge, Ont., Thursday, Aug. 25, 2011.

NEUSTADT, Ont. - Environment Canada has confirmed a third tornado touched down as part of a wild storm system that swept through southwestern Ontario last week.

The agency says the tornado was confirmed after a damage survey along a three-kilometre stretch near Neustadt, about 100 kilometres northwest of Kitchener.

Investigators say damage in the area, which included uprooted trees and destroyed playground equipment, was caused by a tornado rated at zero, the weakest on the Fujita scale.

Environment Canada says tornadoes under that classification can bring winds of up to 110 kilometres per hour.

Tornadoes also hit Nairn, northwest of London, and an area southeast of Cambridge during the Aug. 24 storm.

Environment Canada says there have been 13 confirmed tornadoes in Ontario this year. The annual average is 12.