Canada: Adverse weather forecast across parts of southern Ontario and Quebec late June 22

Severe weather is forecast over parts of southern Ontario and Quebec as of late June 22. Heavy rainfall, strong winds, large hail, and possible tornadoes may accompany storms. Winds gusting up to 100 kph (62 mph) are possible across the region over the coming hours. Heavy downpours could trigger flooding in low-lying areas, and strong winds could cause property damage and power outages. Authorities have warned people in the affected area to take cover if threatening weather approaches.

As of late June 22, Environment Canada has issued red heavy rainfall warnings (the highest level on a three-tier scale) for the areas from Sault Sainte Marie and St. Joseph Island to the Greater Sudbury region, Manitoulin Island, most of the Southwestern Ontario region, and Ottawa and the National Capital Region in Ontario, into the Saint Lawrence Valley, including Montreal and Quebec City in southern Quebec. Heavy rainfalls of 6-8 cm (2.4-3.1 inches) are possible. A yellow severe thunderstorm watch is in effect for areas west of the Golden Horseshoe and south of Georgian Bay. A grey special weather statement is also in place around the Greater Toronto Area to the Eastern Ontario region, including Kingston and Cornwall. A yellow tornado watch remains in effect for Bruce and Grey counties in Southwestern Ontario. Officials could issue further weather alerts for severe storms and possible tornadoes over the coming hours.

The severe weather could contribute to transport disruptions throughout the region. Floodwaters and debris flows may render some bridges, rail networks, or roadways impassable, impacting overland travel in and around affected areas. Ponding on road surfaces could cause hazardous driving conditions on regional highways. Authorities could temporarily close some low-lying routes that become inundated by floodwaters.

Severe weather may trigger flight delays and cancellations at airports across the affected region. Flooding could block regional rail lines; freight and passenger train delays and cancellations are possible in areas with heavy rainfall and potential track inundation.

Localized business disruptions could occur in flood- or tornado-hit areas; some businesses might not operate at full capacity because of damage to facilities, possible evacuations, and some employees' inability to reach work sites. Strong winds could also cause power outages.