The unusual foehn record of 2016
The foehn on the northern side of the Alps in 2016 turned out to have an extremely long duration. From 2nd to 5th April, it blew for 65 hours, or almost three days, without interruption at the Altdorf weather station.
In May, the foehn significantly increased its staying power again. From 5th to 7th May, it was present for 42 hours, followed by a short interruption of 2 hours and 20 minutes. This was followed by a 93-hour period (just under four days) without interruption until 11 May. Both periods together result in a foehn duration of 136 hours, i.e. around 5.5 days.
In November 2016, Altdorf experienced its third long foehn period within a year. From 20th to 24th November, the foehn swept over the weather station for 109 hours, or 4.5 days, without interruption. In the almost 40-year automatic measurement period at the traditional foehn location of Altdorf, there has not been a year with more than two foehn periods of over 60 hours.