The Southern Alps and the Mackenzie Basin can present demanding weather conditions.

In the summer strong westerly, northerly or north-westerly winds can, at 7 to 10,000ft, generate standing wave with consequent low level rotor and downwind turbulence from the ridges. The result is moderate to often severe turbulence during transit and demanding circuit and landing conditions. Winter is characterised by more stable conditions, but low cloud and fog are not uncommon.