September snow falls in Calgary, western Alberta

Calgary got an early dose of winter Monday as drizzling rain turned into big fluffy flakes of snow.

Environment Canadaissued a snowfall warning for the city Monday evening.

• September snow in the forecast for Calgary Monday
• Snow falls in Alberta's mountains as frost advisories are issued
• CBC weather updates

A cold front that brought rain to Calgary, and other parts of southwestern Alberta overnight, had even colder air behind it thatproduced accumulations of snow.

"The first significant snowfall of the season is occurring," said the national weather agency on its website. "General snowfall accumulations of five centimetres are expected, however, greater accumulations are possible in some areas including higher elevations. Snowfall accumulations will vary significantly depending on surface type and snowfall intensity. Snow will taper off this evening in Calgary and overnight inPincherCreek."

The heavy snow alsocausedtree branches to break, which created power outage problems in some areas around the city.

• See the latest power outages here
• Is it snowing where you are? Send us pictures. Email calgaryphotos@cbc.ca or Tweet us@cbccalgary.

Blowing wet snow west and north of the cityreduced visibility on the highways in the area.

Environmentissued weather alertsfor many areas in southern Alberta on Monday:

• Kananaskis andCanmore: snowfall warning.
• Crowsnest Pass, Pincher Creek andWaterton: snowfall warning.
• Airdrie,Cochrane, Olds andSundre: snowfall warning.
• Okotoks, High River andClaresholm: snowfall warning.
• City of Calgary:snowfall warning.