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Torrential downpours and the threat for localized flooding will dominate southern Ontario's weather forecast Tuesday, with two sets of rain targeting the region.

Two rounds of thunderstorms target southern Ontario

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Cheryl Santa Maria
Digital Reporter

Tuesday, June 24, 2014, 3:30 PM -

Forecasters are keeping an eye on two systems targeting Ontario with the first round moving in just ahead of the Tuesday evening commute.

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"The storms have already pushed into southwestern Ontario, reaching the GTA in time for the drive home," says Weather Network meteorologist Kelly Sonnenburg.

"That will be the first round of rain." 

Wind damage has been reported in the Barrie area, prompting social media speculation that a tornado may have touched down.

Meteorologists are quick to point out that that those rumors are false and the damage was more likely caused by straight line winds.

No signs of rotation have been picked up on weather radar.

Hot, humid air is helping to fuel the storms. Humidex values in the 30s have been reported in some communities.

"The second round of rain will fire up around 8 p.m. and persist into the evening," Sonnenburg says.

"The biggest threat will be torrential rain and strong winds. Isolated severe thunderstorms are more likely to pop up north of the GTA and through the London area."

According to Sonnenburg, the second round will linger into the overnight.

"On Wednesday it looks like there will be some clearing but the risk of scattered isolated showers will persist through the day," she says.

After the storms move through, temperatures will stabilize to near-seasonal levels for the remainder of the week.

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