Our trip to Zermatt is only a few weeks away ---- is there a good website to see weather, current conditions etc ?
They give a 3 day forecast for free, register for 6 and pay as a member for 9.
As far as weather goes, www.yr.no is pretty accurate. One of very rare, that use local models and not general ones, which are pretty much useless in Alps as weather in one valley is completely different then in the other, which is just 5km over the hill away. Only other one, to use same sort of models is Meteo Swiss, but it's paid service.
As far as snow conditions goes, Bergfex.com is good one, and of course local web.
Edit: It should be "only other one >I know off<", as I'm sure there are other services and not just Meteo Swiss and Norwegian meteo institute to use local models.
Prim, thanks for that steer, I've never used YR.NO, I'm going to try it over the next week and see if it's accurate for the Valchiavenna. Another good one to know (I'm loading in Zermatt for the OP) is: https://www.meteoblue.com/en/switzerland/weather-zermatt
Forgot to mention that the Skiclub GB has reps in many of the top resorts and they give regular reports on the real conditions in the resorts, not the tourist board ones.