Bulletins are no longer being issued. www.avalanche.ca/spring describes some basic spring problems as well as www.mountainconditions.com can be a good source for information.
Snowpack Summary
Lingering pockets of snow can be found in Alpine and treeline areas. The avalanche danger associated with these areas varies highly depending upon the termperatures at the time. Warm temps typically mean loose wet snow that has potential to avalanche. Frozen snow is generally stable and less likely to avalanche. So, timing is everything... Information about common spring problems can be found at https://avalanche.ca/spring and also https://www.mountainconditions.com/