Tornadoes, hail and severe thunder possible in parts of southern Ontario

The most severe weather day of the season, bringing thunderstorms, hail and tornadoes, is possible in parts of southern Ontario tomorrow.

The temperature is expected to soar with a high of 28 C and a humidex of 33 C on Thursday (June 13) in much of the GTA including Mississauga, Brampton, Halton Region, Hamilton and Durham Region according to Environment and Climate Change Canada.

With the warmer temperatures, there is also a 60 per cent chance of showers and a risk of a thunderstorm, Environment Canada notes.

But other forecasters are predicting more severe weather.

Areas just north of the GTA including Orangeville, Collingwood, Newmarket, Barrie and Orillia might see strong storms bringing destructive wind gusts over 100-110 km/h and large hail, according to Instant Weather.

Tornadoes are possible, particularly in the Barrie, Orillia and Muskoka area, Instant Weather suggests.

The Weather Network is also forecasting a severe storm in southern Ontario and the potential for the “most severe weather day of the season” on Thursday.

“With the increasing heat and high humidity, comes instability in the atmosphere,” the Weather Network notes on its website.

There could be a few showers or thunderstorms on Thursday morning, then a clearing before more intense thunderstorms in the late afternoon and evening in southern Ontario, according to the Weather Network.

Lead photo: Ralph W. lambrecht