Storm Chasing Ontario: 2020 Season 

It just depends on the set up. They can happen anywhere in Ontario. In the Summer, lake breezes can play a big part in storm development usually in the area north & west of London and also between Newmarket and Barrie, but lake breeze storms for the most part don't tend to be severe and act more like pulse storms. SW Ontario in general probably gets more storms than anywhere else and has great terrain & road network for chasing. They tend to get more severe weather earlier & later in the season due to better access to warmth and moisture. But like i said, each set up is different..Cottage country and Eastern Ontario have had the best set ups synoptically over the past couple years but chasing in those areas is very difficult with trees and lack of roads.