Tornado chance arises as eastern Ontario, Quebec sees severe weather threat
Thursday will be a day to be weather-aware in eastern Ontario and southern Quebec, which will see numerous storms roll in with all hazards possible, including a tornado risk for some
Thursday will be a day to watch closely in eastern Ontario and southern Quebec, as the recent high heat and humidity are providing ample storm energy across the province.
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The Laurentians in Quebec and north of the Ottawa Valley in Ontario will have favourable, atmospheric conditions for tornado development on Thursday, while other areas west of there and eastern Ontario could see flooding.
You'll want to stay updated on the weather alerts in your area as conditions can change quickly when severe weather hits.
Thursday: Ample thunderstorm energy leads to strong storms, tornado risk
Forecasters are keeping a close eye on Thursday, with a low-pressure system and strong cold front expected to bring more severe weather to eastern Ontario and southern Quebec. The system will track over the Great Lakes Thursday morning and continue eastward through the day.
Ample thunderstorm energy, fuelled by several days of 30°C heat and high humidity, could lead to strong thunderstorms with torrential downpours. Between 50-100 mm of heavy rainfall is possible under storms, increasing the risk of localized flooding.
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Non-severe thunderstorms are expected to move through the Greater Toronto Area (GTA) before peak afternoon energy develops.
Thunderstorm energy will be abundant by the afternoon hours, with ample moisture, and signs of notable shear will result in strong and severe storm clusters over the Ottawa Valley and southern Quebec.
Multiple rounds of strong to severe storms are likely for Quebec City.
-4 p.m. will be the highest risk for severe weather in Ottawa with the cold front.
6 p.m. for Montreal.
11 a.m. to 9 p.m. for Quebec City.
The Ottawa and St. Lawrence valleys will be concerned with flooding potential, while tornado ingredients may be present north of the Ottawa Valley and over the Laurentians, although confidence is still low and conditions are being closely monitored by forecasters.
The active weather will be followed by a welcome cooldown, offering relief from the heat.
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Stay with The Weather Network for all the latest on conditions across Ontario and Quebec.