Feeds are generated on a per resort basis in XML format, there are comments in the XML.
All units are metric (cm / °C), you’ll have to convert them yourself if you want imperial units.
The main difference in the feeds is that both Lake Louise and Norquay have two sets of snow conditions, distinguished with upper or lower in their name.
Sunshine Village only has one set of conditions, labeled as lower.
Feeds are usually updated by the resorts anywhere between 5am and 11am MT during the season, and may be updated intermittently throughout the morning.