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Heavy rain could disrupt Monday evening commute in southern Ontario

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Dalia Ibrahim
Digital Reporter

Sunday, April 6, 2014, 8:08 PM -

It was nice while it lasted, southern Ontario. Sunday's sunny skies will be replaced by widespread cloud coverage, heavy rain a dip in temperatures come Monday.

A moisture laden US low is set to develop over parts of southern Ontario during the day Monday, reaching Georgian Bay in the evening.


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"The GTA can start to see showers as early as 2 p.m. [EDT]," says Brett Soderholm, a meteorologist at The Weather Network. "The system will gradually intensify throughout the day and will most likely impact -- and slow down -- the evening commute across southern Ontario." 

Environment Canada has issued a special weather statement ahead of the system, calling for general amounts of 20 to 30 mm of rainfall over much of the region.


SEE ALSO: Messy weather makes a comeback in Ontario


Heavier amounts are expected closer to Lakes Erie and Ontario, adds the agency. 

The system will push eastward into Ottawa and Quebec in the evening, while intensifying around midnight. 


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Current models suggest 25 mm of rainfall, or more, is possible near and south of the St. Lawrence and Ottawa River. 

As for snow, areas south and east of Georgian Bay could see wet flurries Monday overnight into Tuesday. Five to 10 cm of snow is possible in the region, with locally higher amounts possible.


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"Snow will continue in a line, northeast into central Quebec," says Gina Ressler, another meteorologist at The Weather Network. "General amounts of 5 to 15 cm of snow is expected, with locally higher amounts possible. Montreal will see straight rain from this system." 

Predicted rain for Monday combined with snowmelt could cause water levels to raise and cause some minor flooding. The Nottawasaga Valley Conservation Authority and the Kawartha Conservation have issued a flood watch for the area.


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Municipalities are advised to monitor areas of historically known flooding problems closely and to be prepared to respond to high water situations as they occur. Residents are advised to contact their municipalities should a flood threat develop. 

Be sure to check back as we continue to monitor this system. Rainfall warnings could be issued over the next 24 hours.

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