Before I go skiing I always check out Snow Forecast. It is a fairly cludgy site, but so useful, with a free six day forecast available for every resort in Switzerland (and elsewhere) and bags of additional info. Really useful site. Here is an example of the information available (updated in real time, so this is what it is really like!):
View detailed snow forecast for Grindelwald at:
snow-forecast.com
Another useful site is the Swiss site, Meteo Swiss and the Institute for Snow and Avalanche Research, really useful for going off-piste.
