The good thing is that the wind will turn more north-westerly than south-westerly on Monday, which should also bring a little more snow to the north side of Switzerland.
Areas and duration:
This alert applies from the Hautes Alpes to central Switzerland, although some outsider models are also predicting snow on the north side further east, but then probably less than the alert amounts. There could also be some snow in the southeast towards Carinthia/Italy, even more there, but this is very uncertain and I doubt whether the Italian low will push far enough towards the Alps.
The alert is valid until Monday afternoon, whereby most of the snow should have fallen by Monday morning.
Wind:
Strong southwest to west winds will turn to north by Monday and will probably weaken somewhat. Nevertheless, most of the snow will come above the tree line with a lot of wind and may then be slightly covered, which could be quite treacherous. The combo of little old snow, lots of wind and another sugar on top is not really tempting. See what the warning services have to say!
Snow line:
It will initially be between 1200-1400m in the south and in places already below 1000m in the north, and will gradually drop below 1000m everywhere by Monday. The weather is therefore suitable for powder. Due to minor foehn effects, the snow line may be 100-200m higher than expected locally because the low pressure is passing quite close to the Alps and the wind is constantly shifting.
