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Fog creates near zero visibility in parts of Ontario Thursday

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Cheryl Santa Maria
Digital Reporter

Thursday, May 1, 2014, 6:29 AM -

Environment Canada issued a series of fog advisories between the London and Barrie regions on Wednesday.

Those advisories remained in place early Thursday as dense fog resulted in near zero visibility.

"Visibility may be significantly and suddenly reduced to near zero. Travel is expected to be hazardous due to reduced visibility," warn EC in the advisory.

The conditions are a result of advection fog, which forms when warm air gets trapped behind a dense layer of cold air.

RELATED: Thunderstorm risk creeps into southern Ontario Tuesday, heavy rain picks up

Weather Network meteorologist Brian Dillon says the conditions will remain in place through the morning commute.

"A combination of recent heavy rain and cool east winds off Lake Ontario has resulted in advection fog, which will impact commutes Wednesday evening and into Thursday morning, reducing visibility to under half a kilometre in some places," he says.

The conditions are expected to clear when winds pick up around 8 a.m.

Visit the Alerts section of the website to keep on top of watches and warnings in your community.

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