Stay alert: Black ice threatens travel across the Ottawa area Friday
Icy risk developing for parts of eastern Ontario Friday morning, Ottawa included
Drivers beware: A freezing rain risk moves into Ottawa area early Friday morning, with slick roads possible ahead of the commute.
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This may not develop into a significant weather event, but fog could also pose challenges for driving, potentially leading to the formation of black ice—a hidden hazard for drivers. With temperatures below freezing, freezing fog is possible, along with freezing rain or drizzle.
Black ice can form when a thin layer of moisture freezes on road surfaces, becoming nearly invisible against dark asphalt, which can increase the risk of accidents. Motorists should remain cautious and anticipate reduced visibility, especially in the early morning or late evening.
Cold front slides through late Thursday, freezing rain risk increases Friday
A cold front will slide southward overnight Thursday, creating a brief risk of freezing rain in the Ottawa area early Friday. Light moisture tracking down the Ottawa Valley could lead to icy conditions during the morning commute.
This week, temperatures across Ontario have been slightly below seasonal, with overnight lows dipping a few degrees below freezing. As cold air settles in the valleys overnight, it increases the chance of freezing rain as moisture arrives.
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The areas most likely to see impacts include eastern Ontario from Arnprior to Cornwall, the Richelieu Valley in Quebec, and Highway 7 near Perth, Ont.
Drivers travelling overnight Thursday into Friday morning are urged to exercise caution due to the potential for slick roads.
Slippery sidewalks pose a risk of falls or injuries for pedestrians, as well. Plan commutes accordingly and take extra care on roads and walkways.
By mid- to late morning Friday, rising temperatures above freezing should reduce the risk of icy conditions.
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Be sure to check back for the latest weather updates across Ontario.