Humidity in Ontario nurtures multiple rounds of severe storm potential
Ontario is heating up on Tuesday, with some severe weather potential that could boom or bust in the Greater Toronto and Hamilton Area (GTHA), and other locales in the southern region
Residents in northern and southern Ontario will need to stay alert Tuesday.
A couple of rounds of thunderstorms are in the cards through the day and night on Tuesday across different portions of Ontario.
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A widespread risk of thunderstorms will include a severe chance that stretches from extreme southwestern Ontario to northeastern sections along the Quebec border. The main hazards will include torrential rainfall, with localized flooding a concern for some, large hail and strong wind gusts.
The potential for stormy weather will linger through the overnight period in southern Ontario, so it is important to keep an eye on the radar in your area, and stay alert for watches and warnings that may be issued on Tuesday.
Storms could develop across northeastern and southern Ontario on Tuesday
A trough is interacting with a humid environment in Ontario, leading to the risk of thunderstorms. A line of thunderstorms will first move through northeastern Ontario late Tuesday morning and into the afternoon hours.
Folks across southern Ontario will spend much of the day marinating in a warm sector with uncomfortably high humidity. Temperatures will be feeling like the high-30s to low-40s before triggering thunderstorms in the late-afternoon hours.
Although instability may be limited through the Greater Toronto Area (GTA) Tuesday afternoon, storms are expected to become more organized across northeastern Ontario and cottage country.
By the late afternoon, thunderstorms could be triggered in the south. Storms will likely be quite scattered, with many locations missing out on the first round.
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Main threats include torrential rains and localized flooding, as we could see 30-50+ mm of rain falling over areas impacted by thunderstorms, large hail and strong, potentially damaging, wind gusts of 80-90+ km/h. There will be a risk of localized power outages.
The good news is that the storms are not expected to train repeatedly over the same locations, with the setup working to limit significant flood threats.
The severity of the storms will largely depend on the morning cloud cover. If the sunshine is able to break through the clouds, we will see more surface heating and, therefore, stronger storms.
Into Tuesday evening, the low slumps southward with a risk of a round of nocturnal storms pushing across the south.
How severe these storms are will depend on timing and what environment is left after the initial trigger. Additional adjustments to the risk will likely be required as we gain confidence in the evolution of the system.
Stay with The Weather Network for more forecast information and updates on your weather in Ontario.
