The high, open pistes 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 definition when everything else seems to be white.
Bear 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!). 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.
The best thing to do when the weather closes in once you are up the mountain is to head slowly down as safely as possible. Usually, the lower you are on the mountain, the more visibility there will be as the cloud starts to get thinner. Another alternative is to stop in a restaurant, but make sure you have an obvious route down as the weather could get worse, not better. If in the Le Fornet area, Le Signal is just at the top of the Le Fornet cable car so is a good stopping point to see if the weather will pass. In a similar way, Tete de Solaise sits at the top of the Solaise Express chair and the Solaise cable car for an easy descent and you can get straight down from Folie Douce on the La Daille bubble.
If you fancy heading out on the slopes (despite the bad weather) then one of the best areas in Val d'Isere during poor weather conditions is the top of the La Daille area, as the trees running down the pistes will provide much better visibility. Alternatively head to the lower slopes of the Solaise like 'Piste M' which are also treelined but can often be busy. Another great area to head to is Le Fornet as again, there are plenty of trees lining the pistes from the top of the cable car, giving better visibility and definition.
Remember the weather can always change quickly in the mountains (for better or for worse) so make sure if you are out skiing during bad weather you always have an easy and accessible route home.