Environment Canada has also issued frost advisories for a large area of southern Alberta Wednesday.
"Clearing skies combined with a cool air mass will allow temperatures to fall close to the freezing mark in portions of central Alberta. Patchy frost is expected," said the national weather agency on its website.
"Take preventative measures to protect frost-sensitive plants and trees."
While Calgary is not included, there are many areas under the advisory:- Airdrie, Cochrane, Olds and Sundre.
- Drayton Valley, Devon, Rimbey and Pigeon Lake.
- Drumheller and Three Hills.
- Hanna, Coronation and Oyen.
- Leduc, Camrose, Wetaskiwin and Tofield.
- Okotoks, High River and Claresholm.
- Red Deer, Ponoka, Innisfail and Stettler.
- Rocky Mountain House and Caroline.
There are also rainfall warnings in place for the Cardston, Magrath, Fort Macleod, Granum, Pincher Creek, Twin Butte, Crowsnest Pass, Waterton, Piikani Nation and Kainai Nation.
But many of those areas are also seeing snow. Web cams on some Alberta highways, such as Highway 22, show the white stuff falling throughout the morning.
"A low pressure system moving through Montana continues to produce heavy rain in southern Alberta," said Environment Canada on its website.
"Further amounts of five to 10 millimetres are expected in the warning regions. Heavy rainfall will end this evening as the low continues eastward."
But CBC weather specialist Craig Larkins says nicer weather is on the way. It's supposed to warm up for the weekend.