With Pre-patch wrapping up later today, many players have used these last few days to wrap-up their pre-patch bucket list. However, NA players have had their plans foiled by a lack of Wind Primal Storms happening in the past 4 days.
Throughout our comment section and official forums players have been reporting that one of the invasions, the Wind Primal Storm, which spawns Unbridled Storm Lord, seem to have almost ceased to spawn.