When the clouds come in and the light turns flat it can be hard to know where to ski and what to do. The high, open pistes can lack the contrast required for orientation during white out conditions and slope and sky can blur into one.
However, there are certain runs that offer more contrast providing vast amounts of skiing/snowboarding when the flakes are falling. The trick is to head for the pistes that are tree-lined, as they help provide shelter and definition when everything else seems to be white, definitely avoid the high and open glaciers at all costs. One of the many good things about Les Arcs is that there are plenty of trees especially over towards Peisey-Vallandry, and in Montchavin/Les Coches across the valley in La Plagne.
Keep in mind that the valley itself can be covered in an all-encompassing fog, but the top of the mountains can be bathed in glorious sunshine (check out the webcams to make sure you are not missing out on anything). Also, if it’s lashing down with rain in the valley, it means it’s snowing up top, giving you the best and freshest powder you’re likely to ski on, and because it’s a bad weather day, chances are, you’ll have the mountain to yourself.