Up to 40 cm of snow on the way

A serious snowstorm bringing at least a foot of snow is on the way.

Environment Canada has issued a winter storm warning

This relatively pleasant weather will take a turn around noon on Tuesday. (Michel Aspirot/CBC)

A serious snowstorm bringing at least a foot of snow is on the way.

The entire Ottawa-Gatineau region is currently under a winter storm warning, although Environment Canada says snow won't start falling until tomorrow.

The snow starts around noon on Tuesday and as much as 30 to 40 centimetres could fall before it ends Wednesday afternoon, the weather agency says. The snowfall is expected to be most intense Tuesday night.

Winds are expected to blast some of that snow sideways, with gusts up to 60 km/h, causing reduced visibility at times.

Environment Canada says the snowfall will be due to a "Colorado low" — a low-pressure system from the southwest — passing through southern Ontario.

Slightly less snow is expected to fall in areas closer to Kingston, but they could experience stronger wind gusts.

Before that, temperatures will drop down enough to lead to another frostbite advisory from Ottawa Public Health for early Tuesday morning.

The wind chill could make it feel as cold as –28.

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