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Lafontaine Beach, ON

Alerts in Effect

Snow Squall Watch

Issued at 05:57 Sunday 19 November 2017

Snow squalls are expected to develop. Under the snow squall bands, visibilities will be significantly reduced due to the heavy snow, and snow will quickly accumulate.

Snow squalls will likely form to the lee of Lake Huron and Georgian Bay today as northwesterly winds bring colder air into the region.

For the most part, the lake effect snow bands will shift from time to time which will limit snowfall accumulations somewhat. However, there is a possibility that a strong lake effect band will develop tonight. This band would likely affect areas stretching from the Bruce Peninsula towards Lake Simcoe, although the exact placement of the band remains uncertain. This band may produce snowfall rates of a few cm per hour.

Local amounts of over 15 cm within a 12-hour period are possible.

The snow squall activity is expected to end by Monday morning.


Travel may be hazardous due to sudden changes in the weather. Visibility may be suddenly reduced at times in heavy snow.

Snow squall watches are issued when conditions are favourable for the formation of bands of snow that could produce intense accumulating snow or near zero visibilities.

Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to or tweet reports using #ONStorm.

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