The extreme winter weather most of southern Canada has been anticipating landed with a wallop Thursday morning, with much of southern Ontario and Quebec under winter storm and snowfall warnings, and the low-pressure system moving east toward the Atlantic provinces.

Snow began falling overnight in Montreal, and was expected to continue until midday and gradually ease. Flights were cancelled and delayed at the airports in Montreal and Quebec City on Thursday, and the province's transport agency warned of dangerous road conditions,

Storm Warning remains in effect for Montreal and most of southern Quebec. Radar is showing at least a few more hours of steady precipitation to our southwest that will move through the Montreal region through midday.