Canada: Adverse weather forecast across parts of southern Manitoba, western Ontario, and far southeastern Saskatchewan June 12

Severe weather is forecast over parts of southern Manitoba, western Ontario, and far southeastern Saskatchewan June 12. Severe thunderstorms are forecast to develop across the affected area, with the greatest threat of severe weather likely during the afternoon and early evening. 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 early June 12, Environment Canada has issued a red severe thunderstorm warning (the highest level on a three-tier scale) for the Municipality of North Norfolk including MacGregor, Sidney, and Austin in Manitoba, just west of Winnipeg. Officials will likely issue further weather alerts for severe storms and possibly 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.