Timeframe
Until Saturday evening. But most of it will fall by Saturday noon.
Areas
Hautes Alpes to the Arlberg, and the core is from the Belledonne to the western Lower Valais. There will also be a few centimeters further east, which can be used on the base, but it will probably remain below the 30cm alert threshold.
In the southeast, there could be a sprinkle in Slovenia and Carinthia, but I think the flow turns too quickly to the north and that goes into the Balkans.