Big warm-up to follow blast of cold air in southern Ontario [Video]

Some of the coldest temperatures since last month are expected in southern Ontario, but it won’t last with a big warm-up on the way.

Global News meteorologist Anthony Farnell said a blast of cold air has made its way south from the Arctic, bringing with it some of the coldest temperatures southern Ontario has seen in weeks.

Record cold was felt Wednesday morning in Sudbury, North Bay and Timmins with wind chills near -20.

“With clear skies and lighter winds tonight, the temperature will drop below freezing across almost all of southern Ontario and in some cases several degrees below zero,” Farnell said of conditions expected Wednesday night.

“This will lead to widespread frost and freeze conditions for several hours early Thursday morning.”

Farnell noted that frost advisories from Environment Canada are in place only for areas where the growing season is assumed to have started, including Toronto, Niagara and …