Pinwheels and rollerballs of snow indicate the snow surface is getting wet and loosing strength. As more of these start rollling downhill the danger of wet snow avalanches increases. Photo: GNFAC
Advisory Year
Pinwheels and rollerballs of snow indicate the snow surface is getting wet and loosing strength. As more of these start rollling downhill the danger of wet snow avalanches increases. Photo: GNFAC