Heavy snow and extreme cold are affecting large areas of the Prairies after a winter storm rolled through the area over the weekend.

Environment Canada has issued a snowfall warning for parts of northern Saskatchewan and northern Manitoba, with up to 20 centimetres expected in some regions before tapering off Monday evening.

An extreme cold warning is in effect for large parts of Alberta, with wind chills of nearly -40 degrees Celsius that won’t substantially moderate until Tuesday.

Heavy snows and wintry winds grounded flights and closed highways across the Prairies over the weekend.

Environment Canada meteorologist Terri Lang said the hardest hit areas of Saskatchewan were in the west central region, including Saskatoon and through to North Battleford.

In Manitoba, crews are working to restore power after thousands on Sunday were left without functioning energy connections in Winnipeg and other communities.