südliches Tujetsch

Moderate avalanche danger will be encountered over a wide area. Wind slabs and weakly bonded old snow require caution.

The fresh wind slabs are mostly small but can in some cases be released easily. They are to be evaluated with care and prudence in steep terrain. Avalanches can additionally in isolated cases be released in the weakly bonded old snow. They can reach medium size. These avalanche prone locations are rare but are barely recognisable. Their prevalence will increase with altitude. Above approximately 2800 m these avalanche prone locations are to be found in all aspects. Careful route selection is recommended.

Snowpack Below approximately 2200 m there are extraordinarily small amounts of snow on the ground for this juncture of the season, at lower altitudes no snow whatsoever. Even above 2200 m the snow depths are below average over widespread areas; only in the Valais do the snow depths correspond to long-term average values. The predominantly shallow snowpack is extremely influenced by higher temperatures and rainfall below 2200 to 2400 m, and as a consequence of melt-freeze crusts is also riddled with expansively metamorphosed (faceted) layers. At elevated altitudes the more deeply embedded layers inside the snowpack are frequently faceted and loosely-packed. This is the case on west-facing, north-facing and east-facing slopes above 2200 to 2400 m and on south-facing slopes above approximately 2700 m. As a result of the strong-velocity southwesterly winds, fresh fallen snow and loosely-packed old snow will be transported. Freshly generated and somewhat older snowdrift accumulations will tend to be relatively small-sized, but particularly the fresh drifts are easy to trigger. Observed weather review Saturday, 07.01.2023 It was predominantly sunny in the mountains. Fresh snow - Temperature At midday at 2000 m, beteween a mild +5 °C in the western and the northern regions and 0 °C in the southern regions. Wind Winds were southwesterly,

• at elevated altitudes blowing at moderate to strong velocity;
• blowing at light to moderate strength on the southern flank of the Alps.

Weather forecast through Sunday, 08.01.2023 On Saturday night, cloud cover will move in. During the daytime hours on Sunday, skies will be heavily overcast for the most part. Precipitation is anticipated in the western regions during the morning hours in particular, in the southern regions over the course of the daytime. In the foehn-impacted regions of the central and eastern sectors of the northern flank of the Alps and in northern Grisons, it will remain predominantly dry. Fresh snow The snowfall level in the western regions lies between 1200 and 1600 m, in the southern regions between 1000 and 1200 m. Above those altitudes, the following amounts of fresh snow are anticipated:

• northern and furthermost western parts of Lower Valais, central sector of the southern flank of the Alps, Val Bregaglia, Val Poschiavo: 10 to 15 cm;
• in the remaining regions of Switzerland: only a few centimetres; or else it will remain dry.

Temperature At midday at 2000 m, between -1 °C in the northern regions and -3 °C in the southern regions. Wind

• Winds in the mountains will be southwesterly, blowing at moderate to strong velocity;
• in the Alpine valleys, a moderate-strength southerly foehn wind will be blowing.

Outlook through Tuesday, 10.01.2023 Monday Skies will be heavily overcast for the most part, accompanied by precipitation. Only in the central and southern parts of the Ticino will it be partly sunny. Most of the snowfall is anticipated in the western sector of the northern flank of the Alps and in the Lower Valais, at 30 to 50 cm. The snowfall level will lie at 1000 m. Winds are expected to shift from southwesterly to northwesterly and continue blowing at strong velocity in the mountains. The avalanche danger levels will increase significantly over far-reaching areas. Tuesday The major thrust of precipitation is expected to move into other regions: from the eastern Bernese Oberland into the Glarus Alps where, presumably, 20 to 40 cm of fresh fallen snow can be expected. The snowfall level in the northern regions will lie below 1000 m, in the southern regions at 1200 m. During the daytime hours there will be an interim in precipitation, with bright intervals in the northern regions more than anywhere else. Avalanche danger levels are expected to increase a further notch.