This precipitation event was divided in two phases. The first phase, marked by orographic precipitation on 22-23 September, brought high precipitation sums over the southern side of the Alps, in particular over Ticino (see table below). Lower but still high precipitation amounts were also measured in the Upper Valais.
During the second precipitation phase marked by frontal precipitation on 24 September, the precipitation maximum shifted towards the Upper Valais, however high precipitation was still measured in Ticino. On 25 September, precipitation had altogether decreased over the southern Alps, but some high daily amounts were still measured at some stations (e.g. Cevio, 105.8 mm).