Severe thunderstorms possible for Mississauga and Southern Ontario

Published July 20, 2021 at 8:25 pm


Environment Canada says severe thunderstorm watches are in effect for a number of Southern Ontario municipalities in the Peel, Halton, Niagara and Durham regions, including Mississauga, Brampton, Caledon, Oakville, Burlington, Milton, Halton Hills, Niagara Falls, Welland, St. Catharines, Grimsby, Pickering, Oshawa, Uxbridge and Beaverton

According to the weather agency, conditions are favourable for the development of dangerous thunderstorms that may be capable of producing damaging wind gusts and large hail. Wind gusts up to 90 km/h are possible, as well as nickel-sized hail. 

The thunderstorms could start this afternoon (July 20) and last into the evening. 

“Very strong wind gusts can damage buildings, down trees and blow large vehicles off the road. Remember, severe thunderstorms can produce tornadoes. Lightning kills and injures Canadians every year,” Environment Canada says on its website.

“Remember, when thunder roars, go indoors!: 

Residents who are outside when a thunderstorm starts are urged to take cover immediately. 


A severe thunderstorm warning is now in effect for Pickering and Oshawa. 

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