An AS 332, Super Puma, G-TIGB, was returning from the Dunlin A Platform to Scatsta, in the Shetland Islands, UK, when it encountered severe weather generated vortices associated with a waterspout. During the ensuing rapid destabilisation of the helicopter, the tips of the tail rotor blades contacted the tail pylon. Following a safe landing at Scatsta, damage to all five blades and the pylon was discovered.