During nights when skies are clear, a crust capable of bearing loads forms up to high altitudes on steep, south-facing slopes.
As a consequence of solar radiation and higher temperatures during the daytime, glide-snow avalanches and, to an increasing
degree, also wet-snow avalanches can be expected on very steep east and south and west-facing slopes below approximately 2800
m more than anywhere else. In isolated cases, glide-snow avalanches can also be triggered during the nighttime or in the early
morning hours. Glide-snow avalanches can in some places grow to large size north of an imaginary Rhine-Rhone line and from
northern Grisons into the northern Lower Engadine more than anywhere else. On north-facing slopes, the snowpack surface is
often expansively metamorphosed (faceted) and loosely-bonded or, particularly at high altitudes and in pass areas, heavily
impacted by winds. Since last Friday, snowdrift accumulations have been freshly generated. Most of them are small-sized, but
on shady slopes they were deposited on top of an unfavourable old snowpack surface. In addition, in the middle section of
the snow cover, especially in the western sector of the northern flank of the Alps, in the Valais and in Grisons, there are
expansively metamorphosed (faceted) and soft layers evident in places. However, these layers are hardly still prone to triggering.
In places where the snow is relatively shallow, the entire snowpack is often metamorphosed and loosely-bonded.