Cold front turns spring-like conditions back to winter

A heavy snowfall and plunging temperatures enveloped Calgary on Thursday, causing traffic snarls during the afternoon rush hour.

Environment and Climate Change Canada said anarrow band of heavy snow was movingthrough the area,bringing up to 10 centimetres of snow and nearly zero visibility.

"Heavy snowfall will taper off this evening," it said. "Be prepared to adjust your driving with changing road conditions."

Cochrane RCMPreported there wasa multi-vehicle collision in the westbound lanes of the Trans-Canada near Highway 40.

It saidtraffic wasat"a stand still" while vehicles were removed, recommending drivers stay off the highwayif possible until the weather improved, or choose an alternative route.

At least 15 passenger vehicles were being towed, with two semis being removed from ditches, when RCMP were on the scene.

Const. Bonnie Sauve with the Cochrane RCMP says some people were takento the hospital as a precautionbut no serious injuries were reported.

"Everyone was very lucky given the circumstances yesterday," Sauve told CBC News.

In Calgary, slippery roads resulted in a slew of collisions.

Between midnight and 11:30 a.m. Friday, there were 53 non-injury collisions and three injury collisions, according to data from Calgary police.

Three hit-and-runs were also recorded, with one resulting in injuries.

The heavy snow came afterthe warm temperatures that Calgarianshad enjoyed earlier in the day vanished.

During the early afternoon, temperaturesdroppedfrom around10 degrees to below freezing in less than hour.

A cold front arriving from northern Albertawas behind the sudden changes.

The city hit a lowof 11C at around 1 a.m. Friday.

With the wind chill, temperatures could feel as cold as 25C overnight Friday. Wind chill is an approximate measure of how cold it feels during chilly, windy weather. It'sbased on the effects of wind velocity and low temperature on skin.

Environment Canada issued aweather warningfor the Calgary area and the mountain parks. The mountain areas and parts of the Foothills were expected to get snow Thursday evening, with the snowy weather expected to continue through Sunday.

Environment Canada suggests people prepare for cold temperatures and slippery conditions. If you're heading outside, dress warm and be prepared forwet areas to freeze.