Michal,

It's been almost 10 years, and as we all have seen the weather around the World has changed pretty dramatically. You'd be best to gather your weather info off of an internet weather only site, specific to your area(s) of interest IME.

I did not snowshoe or ski when there just backpacked and camped. Your Winter excursion will be much differentt than my experience and you would do well to read over the posts in the Winter Forum. They can give you more timely info on Winter technique, as i have done little of that in the past few years. Best to get the advice of those current on such a topic.