15-20 cm: Significant snowfall could hinder eastern Ontario, Quebec commutes

An inbound clipper will bring heavy snowfall to eastern Ontario and Quebec on Wednesday and Thursday. Expect 15-20 cm in the Ottawa and Montreal regions, with significant impacts on travel

A strong clipper from the Prairies will move Pacific moisture over Ontario and Quebec Wednesday and Thursday.

Snow, falling heavy at times, is forecast to begin Wednesday morning in eastern Ontario before spreading into Montreal in the early-afternoon period.

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Eastern Ontario/Quebec Wednesday afternoon precipitation timing

Snowfall rates intensify through the day. Significant snowfall may stack up, with 15-20 cm forecast for the Ottawa Valley and Montreal. Snowfall warnings are in place.

Travel will likely be challenging, especially during the morning and evening commutes. There may be a significant impact on rush-hour traffic. Visibility will likely be reduced at times.

Conditions improve for Ottawa and Montreal on Thursday morning, while continued snow slowly lifts north. Expect snowfall Thursday in the Laurentians and up the St. Lawrence River, impacting eastern Quebec.

Eastern Ontario and Quebec snowfall through Thursday

Be sure to monitor the forecast for updates regarding snowfall amounts and impacts, as well as any alerts as conditions change or deteriorate.

Stay tuned to The Weather Network for the latest forecast updates for eastern Ontario and Quebec.