As a result of fresh fallen snow and moderate-strength, in some regions strong-velocity winds, fresh snowdrift accumulations were generated primarily in high altitude areas of the regions where snowfall has been heaviest on the northern flank of the Alps. Both fresh snow and freshly generated snowdrifts were deposited atop a hard, frozen, in high-alpine regions heavily wind-impacted snowpack surface. Fresh snow and snowdrifts can be easily triggered particularly in very steep terrain. Fractures deeper down in the snowpack are no longer to be expected. Due to the low temperatures of recent days, the old snowpack is frozen and stable.
As a result of sunshine and daytime warming, numerous loose-snow slides can be expected to unleash from the fresh fallen snow on Thursday.

On Tuesday night, skies were heavily overcast for the most part, on the southern flank of the Alps skies were partly clear. Particularly north of an imaginary Rhine-Rhone line there was snowfall, south of that line it remained by and large dry. During the daytime on Wednesday there was additional snowfall particularly in eastern regions in the form of showers, in the southern and western regions there was some sunshine.

Between Tuesday and Wednesday afternoon:

• on the northern flank of the Alps, 15 to 30 cm over widespread areas, up to 40 cm particularly further to the east;
• from the Lower Valais and northern Grisons as far as northern Grisons: 5 to 15 cm;
• further to the south, less, or else it remained dry.

Since Monday night and until Wednesday afternoon:

• central and eastern sectors of the northern flank of the Alps: 30 to 50 cm; along the Prealps from Vierwaldstättersee into Alpstein, as much as 70 cm;
• western sector of the northern flank of the Alps, northern and central parts of Lower Valais, Prättigau: 15 to 30 cm;
• further to the south, less, or else it remained dry.

at midday at 2000 m, -12 °C.

Winds were northwesterly

• in the western regions, winds were blowing at moderate strength particularly at heightened altitudes, in some places at strong velocity, elsewhere at light strength;
• in the eastern and the southern regions, generally blowing at moderate strength, at heightened altitudes at strong velocity in some places.

On Wednesday night the precipitation will come to an end in the northeastern regions. Skies are expected to clear from the west and the south. In the early morning hours there will be some residual cloud only in the eastern regions, in the other regions of Switzerland it will be predominantly sunny during the daytime.

By Thursday morning:

• in the eastern sector of the northern flank of the Alps and in the northern and eastern regions of Grisons: only a few centimetres;
• in the other regions of Switzerland, it will remain dry.

Temperatures are expected to rise, at midday at 2000 m to between -4 °C in the western regions and -7 °C in the eastern regions.

Winds at heightened altitudes will be blowing predominantly at moderate strength from westerly to northwesterly directions; during the course of the day winds are expected to slacken off.