The Tempest
From Arkham Horror Wiki
The Tempest is a mythos card. It first appeared in the Dunwich Horror expansion.
Card Information
Mythos Type: Environment (Weather)
Gate Opens: Gardner's Place
Clue Appears At: *Cold Spring Glen
Mythos Ability: Luck checks in Arkham are made at a -1 penalty. Speed checks in Arkham are made at a +1 bonus, and investigators receive 1 extra movement point. All flying monsters in the Sky when this card enters play, or that move to the Sky while it remains in play, are returned to the monster cup.