Meteorologists reported gusts whipped up to around 190 kilometers per hour, with the city of Gatineau, about five miles north of the capital, taking the brunt.
Images on social media showed homes with damaged rooftops, as debris was seen swirling through the air in video footage.
Ottawa emergency services official Anthony Di Monte told local media around 30 people were injured, five seriously.
Killer storm Florence dumping 'epic amounts of rainfall' on Carolinas
Meanwhile, electricity company HydroQuebec reported over 130,000 customers were without power in the Ottawa area Friday evening.
Canadian Prime Minister Justin Trudeau urged residents to check on neighbors who might need help.
"We're monitoring the situation and thinking of everyone affected," he said on Twitter.
To everyone dealing with the aftermath of the tornado in Dunrobin, ON & the Ottawa-Gatineau area – stay safe, follow the instructions of first responders and check in with people who might need extra help. We’re monitoring the situation and thinking of everyone affected. #onstorm
— Justin Trudeau (@JustinTrudeau) September 21, 2018
A weather alert was put in place Friday afternoon for all of southern Ontario and Quebec. Winds eased by the time they reached greater Montreal, which was hit by heavy rains but escaped major damage.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ