Surprise! I believe its primary use is in PvP. Hurricane was only previously available during Japan's makeup Articuno Raid Day and the Previous Ultra Bonus event in 2018 (or with an Elite Charged TM).

Track Raid Dates at 👉 leekduck.com/events/

#PokemonGO #Articuno #RaidBattles #ShinyArticuno #EliteTM #LegacyMove