Winds , Flooding, Hail Tuesday, Ontario

On Tuesday, the thunderstorm risk returns to the lower Great Lakes with multiple rounds expected in southern Ontario. There will be a widespread risk of severe storms, potentially bringing hail, damaging wind gusts and localized flooding as the primary hazards.

The storm threat will shift south on Tuesday, with multiple rounds. The main hazards in severe storms will be large hail, damaging wind gusts, and heavy downpours--elevating the localized flooding risk. There's also the potential for a tornado or two to develop, but the higher chance will remain stateside.

Widespread storm risk Tuesday, risk of isolated tornado.. The higher wind and isolated tornado risk will be near and south of the 401 corridor, with heavy rain and hail threatening the entire region.

Tuesday will features multiple rounds of thunderstorms across Ontario, with initial, warm-front storms developing early Tuesday morning.

The morning commute in southwestern Ontario and the Greater Toronto Arwa (GTA) is likely to be slowed down by rain and storms. There's an unusual amount of moisture in the atmosphere, so flooding is a moderate concern. Locally, up to 40-60+ mm of rainfall is possible for some areas.

Environment Canada