A prolonged period of very cold wind chills is expected today until Friday.

A frigid arctic air mass and strong winds will result in wind chill values near minus 30 today through until Friday morning in Mississauga.

Bitterly arctic air has moved into southern Ontario overnight. Overnight low temperatures near minus 20 degrees Celsius combined with strong southwest winds have resulted in wind chill values in the range of minus 30 to minus 35.

Conditions should improve Friday as milder air will move into Mississauga.