Overnight snow is an unwelcome wake up call for residents of Calgary on Monday, and emergency crews are urging drivers to be careful.

The work week is starting with some snow on the roads and main routes are expected to be very slick and messy.

City crews indicate that not all roads have been plowed yet and police are urging drivers to keep their winter driving skills in mind as they head to work.

The icy weather this weekend, combined with the snow and colder temperatures, have made many roads very slick.