As a consequence of strong-velocity southerly foehn wind in some places, snowdrift accumulations will be generated from place
to place, in particular on north-facing slopes in the foehn-influenced regions. These snowdrifts will be deposited atop expansively
metamorphosed (faceted) snowpack surfaces and are prone to triggering.
More deeply embedded inside the snowpack in the southern Valais and in the inneralpine and southern regions of Grisons, there
are weak layers evident. Even though these weak layers are quite pronounced from place to place, there have been no further
avalanches recorded as triggering from these layers since the end of February. In the remaining regions of Switzerland the
snowpack structuring is more favourable.
In the western and the southern regions, nocturnal skies will be frequently overcast and the outgoing longwave radiation reduced.
Thereby, a crust which is rarely capable of bearing loads will be formed on steep south-facing slopes. In the eastern regions
and in Grisons, nighttime skies are predominantly clear and the outgoing longwave radiation adequate. As a result of solar
radiation and daytime warming, wet slides and gliding avalanches are possible, particularly on the northern flank of the Alps
and on very steep sunny slopes.
In the southern regions there is unusually little snow on the ground, at numerous measurement stations less than has ever
before been measured at this juncture of the season. As a result of the shallow, often expansively metamorphosed (faceted)
snowpack there is currently heightened danger of falling into crevices on the glaciers, most particularly in the southern
Valais and in southern Grisons.