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Southern Ontario Tornado Outbreak of 2005
The "Toronto Supercell"
Date of tornado outbreak: August 19, 2005
Duration1: 3 hours, 10 minutes
Maximum rated tornado2: F2 tornado
Tornadoes caused: 2 confirmed, 1 unconfirmed
Damages: unknown
Fatalities: unknown
Areas affected: Southern Ontario

1Time from first tornado to last tornado
2Most severe tornado damage; see Fujita Scale

A series of storms on the afternoon of August 19 2005, spawned tornadoes damaging homes in the Conestoga Lake and Fergus areas, and a possible tornado within the Toronto city limits although this was never officially confirmed by Environment Canada. The storms developed near Stratford, Ontario (20 km west of Kitchener), and spread as far north as Georgian Bay near Collingwood, Ontario.

The main storm cell just to the north of Fergus, dubbed the "Toronto Supercell", spawned two F2 strength tornadoes that were particularly damaging, tearing apart trees and farms, as well as overturning automobiles driving on a highway. The storm also produced winds of well over 100 km/h, golf ball sized hail, prompted a tornado warning and most notably flooded many parts of the Greater Toronto Area and even washed out a portion of Finch Avenue near Sentinel Ave in North York. Rainfall totals from the storm exceeded 140mm (7") in parts of the north end of the city and in Concord, overflowing storm drains which caused severe basement flooding to many thousands of homes.

Flood waters washed away a portion of a parking lot near Keele St and hwy 7 in Concord



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