Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Snowstorm Helm Compares
Who It Suits
Mail is the armor type Evoker, Hunter and Shaman wear. With Agility or Intellect, Snowstorm Helm suits Beast Mastery, Marksmanship and Survival Hunter; Elemental, Enhancement and Restoration Shaman; Devastation, Preservation and Augmentation Evoker.
Transmog Sets
Snowstorm Helm is part of the transmog set Frost Witch's Regalia (Shaman only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Snowstorm Helm Fits
Other Items Named Snowstorm Helm
1 other item in the current build is also called Snowstorm Helm. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 50202 (50195 to 50208) were usually added in the same batch as Snowstorm Helm: the same quest line, zone, vendor or reward set.