Parts of southern Alberta could be blanketed with up to 40 centimetres of snow by tonight, says Environment Canada.
Environment Canada issued snowfall warnings on Sunday morning for Kananaskis and Canmore to the west of Calgary and for Okotoks, High River and Claresholm.
The federal agency also issued a snowfall warning for the areas of Crowsnest Pass, Pincher Creek and Waterton Lakes National Park.
Snow is expected to fall along the eastern slopes of the Rockies until later this evening and could accumulate to between 20 and 40 cm, according to Environment Canada.
Those communities at higher elevations can expect the most snow.
The agency is reminding those travelling by vehicle that visibility could be affected due to heavy snow and that roads could become harder to navigate.