Well these clouds are part of a Chinook arch. The Chinook is a warm wind that blows into Southern Alberta (most frequently in the coldest months) and causes rapid and dramatic rises in temperature. In winter it can melt a foot of snow in a matter of hours. After you've lived in the city for a while, you get to recognise the arch of clouds that forms in the sky...like this one that I took on Saturday. People who suffer from migraines often get very severe migraines when a Chinook blows in because of the associated pressure changes.
Calgary is a great city...lively and vibrant with friendly people! We have perfect weather, with clearly defined seasons. Winter is winter and it's cold and snowy but there's always ski-ing! Summers are hot but with a delightful cool breeze off the Rocky Mountains. And almost every day the sky is big and blue. For other great pictures of cities around the world. check out CITY DAILY PHOTO here: http://citydailyphoto.com/portal/index.php