High-Impact Thunderstorms and Tornado Risk Threaten Southern Quebec; Residents Urged to Prepare

A violent, tornado-like windstorm hit Ulverton near the Galahad SPCA, damaging trees and scattering debris. Suzanne Serhan described: 'The wind picked up. Then things started swirling. I could hear things cracking all around me.'
Galahad SPCA founder Chamie Angie Cadorette noted that the horses on the Ulverton property appeared to sense the danger, gathering instinctively on a hill for protection.
Farm owners were advised to take practical precautions during tornado watches, including securing farm equipment away from animals, filling tubs with drinking water in case watering systems fail, and attaching owner information to horses’ manes in case they get separated.
Forecasters warned of a high-impact outbreak potential, with forecasts of 50 mm of rain in a few hours, hail up to 4 cm, and wind gusts of 110–120 km/h, along with isolated tornadoes; rapid intensification is possible due to heat, humidity and wind shear.
The storm risk spans a wide area, including Montreal, Quebec City, Trois-Rivières, Gatineau, the St. Lawrence Valley, the Gaspé Peninsula, southern and eastern Quebec, parts of eastern Ontario (including Ottawa) and northern New Brunswick, with watches potentially upgraded to tornado warnings if a tornado is detected.
Environment Canada has issued severe thunderstorm and tornado watches across southern Quebec, including Montreal, Quebec City, and the St. Lawrence Valley, warning of wind gusts up to 120 km/h, hail up to 4 cm, and isolated tornadoes, according to The Weather Network. Temperatures are expected to hit 33°C with humidex values in the 40s, and forecasters warn conditions could rapidly intensify into a high-impact outbreak.
The threat is not theoretical. Near Ulverton, a violent tornado-like storm already tore through the area, damaging trees and scattering debris. Resident Suzanne Serhan described the moment: "The wind picked up. Then things started swirling. I could hear things cracking all around me." CBC reports the storm risk stretches from eastern Ontario to northern New Brunswick.
Forecasters are tracking a dangerous setup driven by heat, humidity, and strong upper-level winds — a combination that creates what meteorologists call a "ring of fire" pattern. This promotes rapid storm rotation, large hail, and tornadoes. The Weather Network warns that 50 mm of rain could fall in just a few hours in the hardest-hit areas.
Watches currently cover a wide swath: Montreal, Trois-Rivières, Gatineau, the Gaspé Peninsula, parts of eastern Ontario including Ottawa, and northern New Brunswick, according to CBC. A watch means severe weather could develop. It would be upgraded to a warning if a tornado is actually detected on the ground.
The storm near Ulverton struck close to the Galahad SPCA, a local animal sanctuary. Trees were snapped and debris was thrown across the property. Galahad SPCA founder Chamie Angie Cadorette noted that the horses seemed to sense danger before it arrived — they gathered instinctively on a hill for protection, according to CBC.
The incident shows just how fast these storms can move and how little warning residents may get. The area around Ulverton sits in the St. Lawrence Valley, one of the zones forecasters flagged as highest risk for isolated tornadoes during this outbreak.
Authorities and animal welfare groups are urging farm owners to act before storms hit. Recommended steps include securing heavy farm equipment away from livestock areas and filling tubs with drinking water in case automated watering systems lose power. Owners of horses are advised to attach identification tags to the animals' manes in case they get separated during a storm, as reported by CBC.
For people, officials urge staying indoors during storms and avoiding all water activities. Heat safety also applies — with humidex values in the 40s, staying hydrated is critical even before the storms arrive. Watches can escalate to warnings with little notice, so residents are told to keep checking alerts.
This is not a one-day event. CBC reports that hot, humid, and unsettled conditions are expected to continue for several days after the initial outbreak. More rounds of showers and thunderstorms are likely, keeping the risk of severe weather elevated across eastern Canada through the coming week.
The extreme weather is part of a broader pattern settling over eastern Canada, with heat waves and tornado risks arriving together, according to Yahoo News Canada. Forecasters say the best advice is simple: monitor alerts closely and be ready to act fast when watches are upgraded to warnings.
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