Calgarians should brace for a heavy snowfall this weekend that could bring anywhere from 10 to 20 centimetres.

Snowfall warnings have been issued for big part of central and southern Alberta.

"A storm system is set to hit this weekend bringing heavy snow to certain parts of the province," said CBC Calgary weather specialist Craig Larkins.

"Snow will start along the Rockies early Saturday and spread eastward throughout the day and continue into Sunday."

He said temperatures will drop below freezing and remain there into next week, which means the snow will likely stick around for longer than the first snowfall the city received last weekend.

Larkins said wind will also be a factor.

"On Sunday we could see speeds in the 40-60 km/h range that will blow the snow around causing unsafe driving conditions," he said.

Ahead of the weekend snowfall, there will also a chance of freezing rain over some parts of southern Alberta on Saturday morning.

Calgary's road crews are getting ready for heavy snow this weekend. City spokesperson Carissa Vescio says they will be busy.

"Once it starts to snow we have crews and equipment available ... to work 24/7 around the clock over the weekend," she said.

She says they will be applying salt to road surfaces and bridge decks to prevent snow and ice from sticking to the ground.