Calgarians were bracing for more snow Thursday as forecasters predicted up to 25 centimetres would be dumped on the area.
Environment Canada said snowfall warnings were in effect for the Calgary region, with most snow expected in the evening.
In Calgary, the snow was expected to mix with rain for a total of 10 to 15 centimetres, ending overnight. Forecasters warned the snow at times would be heavy.
Areas west of the city were forecast to be the hardest hit, receiving between 10 and 25 centimetres.
In Grande Cache, where more than 10 centimetres were expected by evening, RCMP had already closed Highway 40 from Highway 16.
In a statement, the police said heavy snowfall on Wednesday caused numerous tractor-trailer units to spin out, stranding other motorists along the highway and in the ditch.
Police said continued snowfall and the stranded vehicles hampered snow-removal efforts, forcing them to close the route.
Snow warnings were in effect for the following areas:
* Bow Valley
* Canada Olympic Park
* Grande Cache
* Hendrickson Creek
* High River
* Nakiska Ridgetop
* Rockey Mountain House
* Willow Creek
Bron: CBC | Gewijzigd: 9 mei 2008, 17:48 uur, door Marga
An overnight dump of snow knocked out power to more than 600 homes east of Calgary and made road conditions treacherous on Friday.
Utility company Fortis Alberta said electricity in the Wintergreen area, south of Bragg Creek, went out sometime overnight and crews were working Friday to restore the lines as quickly as possible.
"We have had crews on site this morning to try to figure out what's going on, and we really hope to have the power back up as quickly as possible," said Fortis Alberta spokeswoman Jennifer McGowan.
She warned that she could not say for certain how long the power would be out.
"We think there may be some significant damage to our facilities. It could be a while."
She said the outage was caused by the heavy, wet snow in the area.
'Really bad driving conditions'
"We haven't located the exact cause yet, it could potentially be a tree on the line, for example, so it is going to take some time to investigate that and figure out how to fix it," she explained.
The RCMP said in a release that several roads in the area were in poor condition with icy sections and warned drivers to be cautious on their morning commutes.
Travel was not recommended on Highway 40, Highway 1A, and the Cochrane area of Highway 1 east of Highway 22, which was blocked with snow.
Police also said there were "really bad driving conditions" on Highway 1 in the Canmore area, where between 20 and 30 centimetres of snow fell.
Environment Canada had a snowfall warning in effect for the Calgary region Thursday, with forecasters predicting snowfall up to 25 centimetres. In most regions, the snow tapered out overnight, but warnings remained for the regions of Kananaskis-Canmore, Okotoks-High River-Claresholm and Crowsnest Pass-Pincher Creek-Waterton Park on Friday.