By Tom Spears, Ottawa Citizen, September 28, 2017
The storm that hit Ottawa on Wednesday produced a wind gust of 160 km/h at the Britannia Yacht Club, near the heart of the damage zone, Environment Canada says.
As well, it says the Britannia instrument measuring wind speed recorded a one-minute period at the storm’s height with an average wind speed of 140 km/h.
By comparison, an EF1 tornado has winds of 138 to 177 km/h. That scale goes up to EF5, with winds greater than 322 km/h.
http://ottawacitizen.com/news/local-news/storms-downburst-winds-reached-160-kmh-in-britannia