Snowfall overnight created slippery conditions on city streets and surrounding highways on Friday and more snow is expected for the weekend.

CTV Calgary Meteorologist Kevin Stanfield says a low pressure system sent moisture into southern Alberta on Thursday evening and combined with cold air from an Arctic high to create the snowy conditions.

He says temperatures will continue to fall throughout Friday and that the weekend temperature for Calgary will be back in the minus 20s.

A number of collisions were reported by YYC Transportation and 511Alberta.

The city says crews are putting down a pickle mixture on major routes to help with traction and motorists are advised to drive to the conditions.

Environment Canada has issued an extreme cold weather warning for most of the province and says wind chills between minus 40 and 50 will be experienced in some areas.

WEATHER AND ROAD RESOURCES

For updated information regarding weather warnings and watches, visit Environment Canada – Public Weather Alerts.

Click HERE for cold weather safety tips for pets from the Calgary Humane Society

For the latest on road conditions in Calgary, follow  YYC Transportation on twitter or check the CTV Calgary Traffic Page HERE.

For updates on highway conditions, follow 511 Alberta on twitter, visit AMA Roads Reports and the DriveBC sites.

Download the CTV Calgary Sky Watch Weather App for real-time weather forecasts and video updates on conditions HERE.

For more information on the city’s snow removal process, click HERE.