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Rainy weather continues in southern Ontario

Showers will move out of the lower great lakes and into Quebec over the weekend
Showers will move out of the lower great lakes and into Quebec over the weekend

Staff writers

August 11, 2012 — More rain is expected throughout the weekend as a low pressure system moves northeast out of southern Ontario.

The Toronto Islands were hit hardest on Friday, with over 50 millimetres of rain
The Toronto Islands were hit hardest on Friday, with over 50 millimetres of rain

For the third day in a row, the southern Great Lakes can expect rainfall, after heavy rain triggered flood watches on Friday.

The low pressure system hanging over Southern Ontario will make its way east on Saturday bringing rain into northwestern Ontario and parts of Quebec overnight. Scattered showers and isolated thunderstorms can be expected through Saturday and into Sunday morning for the lower great lakes. The rains will become more spotty for southern Ontario through Sunday afternoon with skies beginning to clear up through the overnight.

Environment Canada issued a special weather statement for a large part of southern Ontario on Friday, including: Toronto, Hamilton, Waterloo, Peterborough and cottage country.
On Friday, Toronto and Region issued a flood watch, warning of potential flooding in low-lying areas, on streets and sewer surcharging. On Friday, the Toronto Islands got over 50 mm of rain during the early morning hours while Pearson International Airport saw just over half of that total with 26 mm. A la

Drivers are being advised to exercise caution on the roads.

"It doesn't look to be a hugely long event for the heavy rains, but it's definitely going to be a significant amount of rain Friday," said Weather Network meteorologist Mark Robinson. 

For communities along Lake Huron, there may even be the opportunity to spot a waterspout or two. At least one waterspout was officially identified over Lake Ontario Thursday. Forecasters say the weather conditions were extremely favourable for its formation, and there may be more on the way.

"With the low pressure to the south of Southern Ontario and a high pressure to the north, this provides the perfect environment for waterspouts, as the Great Lakes remain warm and the temperatures aloft become cool." explains Monica Vaswani, another meteorologist at The Weather Network. "The current atmospheric conditions allow for a heightened waterspout risk over the next few days."

This weather phenomenon occurs as cooler air passes over the warm lakes and is characterized by a fast whirling, funnel-shaped column of vapour between a cloud and the surface. While they look like tornadoes, they're usually less destructive and have a shorter lifespan than land-based twisters.

"Waterspouts are normally seen in the early fall, when we get those really hard cold snaps, that's when you see those kick up," Robinson said, but a summertime occurrence isn't unheard of.

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