During a night of clear skies a crust capable of bearing loads forms over widespread areas on sunny slopes. As a consequence
of daytime warming and solar radiation this crust then thaws and the snowpack subsequently forfeits its stability. Wet-snow
and gliding avalanches are possible. In the last few days only very few wet-snow avalanches have been recorded in spite of
the mild temperatures and sunny skies.
In the inneralpine and the southern regions of Grisons, as well as in the southern Valais, deeply embedded inside the snowpack
there are pronounced weak layers evident. These layers can react with unusual sensitivity to moistening. Moist and wet-snow
avalanches can, in those places, sweep away these deep layers inside the snowpack or fracture directly in those layers. They
can, in some places, be triggered by persons.
The snowpack on south-facing slopes below approximately 3000 m, on east-facing and west-facing slopes below approximately
2500 m, and on north-facing slopes below approximately 1600 m, is thoroughly wet.