Parts of southern Ontario under severe thunderstorm watch, 90 km/h winds expected

Dark clouds hang in the sky as a severe summer storm passes through southern Ontario on Aug. 2, 2015. (Christopher Gara)

A ‘severe thunderstorm’ watch is in effect Monday as strong winds and large hail are expected to hit parts of southern Ontario.

At around noon, Environment Canada warned residents thunderstorms are expected sometime today across parts of southern Ontario, including Niagara, Peterborough, Bancroft, Kingston and York Region.

Just after 5 p.m., the watch ended for a number of areas, including York Region, Pickering, Oshawa and southern Durham Region, along with Peterborough.

According to the weather advisory, the storm conditions are expected to bring strong winds of up to 90 km/h, heavy rainfall, and large hail of up to three centimetres in diameter.

The federal agency reminded residents hail this size can cause injury and damage to property.

“Strong wind gusts can toss loose objects, damage weak buildings, break branches off trees and overturn large vehicles,” the weather advisory reads.

“Heavy downpours can cause flash floods and water pooling on roads.”

The Office of the Fire Marshal and Emergency Management encourages residents in these areas to immediately take cover “if threatening weather approaches.”

In Toronto, Environment Canada is forecasting a 40 per cent chance of rain, risk of a thunderstorm and northwest wind gusting 20 to 40km/h on Monday night.

Thunderstorm Outlooks for Ontario valid for Tuesday and Wednesday. #ONStorm #ONwx pic.twitter.com/FhxVFhTUDs

— ECCC Weather Ontario (@ECCCWeatherON) September 19, 2022

Environment Canada issues severe thunderstorm watches when the weather forecast includes large hail, damaging winds, or torrential rainfall.

Ontarians can keep track of the storm by keeping an eye out for Environment Canada’s alerts and forecasts.

Severe weather reports can also be sent in by tweeting with #ONStorm, or emailing [e-mail].