By CBC News Ottawa, August 4, 2017
Environment Canada has issued a tornado watch for much of the Ottawa region, as well as a severe thunderstorm watch. Petawawa, Pembroke, Cobden, Killaloe, Arnprior and Calabogie are experiencing conditions "favourable for the development of severe thunderstorms which may produce tornadoes," said the weather agency. A tornado watch has also been issued for Bon Echo.
http://www.cbc.ca/news/canada/ottawa/tornado-watch-storm-august-5-2017-1.4236110