MeteoSwiss reported that in March winds over would be expected to recur on the Swiss Plateau approximately once every four years. Between the mid 1980s and 2001 the return period for these winds was approximately one in three years, but has been less commonly observed in recent years. Considered throughout the year (not just for the month of March) the wind gusts measured on 31 March 2015 were not exceptional. In the Swiss lowlands such a wind event occurs about once in every two years, though locally, there were gusts which only occur at that location once every 5 to 6 years, for example at Affoltern, Zürich. In the Swiss mountains a gust of was measured on Säntis, which occurs approximately every 1 to 2 years, and on Mount Pilatus a gust of was recorded, which is expected about every 4 to 5 years.