It was confirmed near Metcalfe, Ont., a rural community about 30 kilometres southeast of Ottawa, just before 7 p.m. eastern time.
There were also a number of reports of hail throughout the national capital, along with strong winds and rain.
Ottawa Fire Services says part of a roof was ripped off a home in Riverside South, a community south of Nepean.
Severe storms in mid-July brought tornados to Barrhaven, which is another south Ottawa neighbourhood, and to Mirabel, Que.
About 125 homes were damaged in Barrhaven during the July 13 storm, said Kim Ayotte, the general manager of emergency and protective services for the City of Ottawa.
Most of the damage involved roofs being ripped off homes, broken windows and damage from falling trees. There were no serious injuries.