Is there anybody mapping ski pistes any more in the USA? It's winter there too, but here are the piste edits for last month (red dots) :

monthly_no_us.png

Or do I have an issue with my script ?

Anyway, glad to see on the last Modis update that the sun is shinning again above scandinavia: If the satellites can get the snow cover, this means that they can see the ground in daylight.