Bex-Villars

Wet and gliding snow represent the main danger.

Outgoing longwave radiation during the night will be barely evident. From origins in starting zones where no previous releases have taken place wet and gliding avalanches are to be expected at any time. These can in some cases release the entire snowpack and reach very large size in isolated cases on north facing slopes. This applies in particular below approximately 3000 m. In the typical avalanche paths avalanches can reach areas without any snow cover.

Avalanche prone locations for dry avalanches are to be found in particular on steep northwest, north and northeast facing slopes above approximately 3000 m. In some places avalanches can be released in near-surface layers. The avalanches are rather small. Careful route selection is recommended.

Snowpack Dry-snow avalanches are still possible in high alpine regions, particularly on very steep north-facing slopes. The snow cover on north-facing slopes below approximately 2500 m is thoroughly wet, in the other aspects it is thoroughly wet up to over 3000 m. In the southern Valais and in Grisons more than anywhere else, as well as from place to place in the other regions, there are still pronounced weakened layers evident deeply embedded inside the snow cover. On north-facing slopes between approximately 2500 and 3000 m, these weakened layers are gradually becoming thoroughly wet for the first time this season, and thereby weakened still further. Wet-snow and gliding avalanches can still be expected in avalanche starting zones which have not yet discharged. During the night of overcast skies, the snow cover surface was able to cool only to a limited degree, it froze over only at altitudes above the zero-degree level. For that reason, as well as due to rainfall, the danger of wet-snow avalanches is heightened already during the morning hours and subsequently increases somewhat during the course of the day, particularly in regions where there are bright intervals. Naturally triggered, wet-snow avalanches can be expected. On north-facing slopes above approximately 2400 m more than anywhere else, releases can sweep away the entire snow cover and avalanches thereby grow to large size. Observed weather review Sunday, 07.05.2023 Nighttime skies were overcast accompanied by precipitation. During the daytime hours skies were variably cloudy, accompanied by extended sunny phases in the southern and the eastern regions. In the western regions skies were predominantly overcast for the most part. During the afternoon there were increasingly frequent showers. Fresh snow The snowfall level lay between 3000 and 2500 m. In the high alpine regions the following amounts of fresh snow were registered:

• from Val Bregaglia into the Bernina region: 10 to 20 cm;
• in the other regions of Switzerland, less.

Temperature At midday at 2000 m, between +7 °C in the northeastern regions and +12 °C in the southern part of Upper Valais. Wind Winds were blowing at light to moderate strength from westerly directions. Weather forecast through Monday, 08.05.2023 Nocturnal skies on Sunday night will be overcast and precipitation is anticipated over widespread areas, most of it in the form of rainfall in the central and eastern parts of the Prealps. During the daytime hours on Monday skies will be variably cloudy accompanied by sunny intervals in the western and the southern regions more than anywhere else. In the eastern regions skies will remain predominantly overcast. Also during the daytime hours, showers are possible. Fresh snow The snowfall level during the night will lie at 2500 m, during the daytime the snowfall level will lie at approximately 2800 m. In the high alpine regions, the following amounts of fresh snow are anticipated:

• on the northern Alpine Ridge: 10 to 20 cm;
• in the southern part of the Valais and in the Bernina region: 5 to 15 cm;
• in the remaining regions of Grisons: 5 to 10 cm.

Temperature At midday at 2000 m, between +8 °C in the Valais and +6 °C in the remaining regions of Switzerland. The zero-degree level will lie between 2800 m and 3000 m. Wind Winds will be blowing at light to moderate strength from westerly directions, subsequently shifting to northeasterly directions. Outlook through Wednesday, 10.05.2023 Tuesday Nighttime skies on Monday night will be partly clear. During the morning hours on Tuesday it will still be quite sunny. Subsequently, cloud cover will swiftly increase and precipitation will set in. In the eastern parts of Grisons, it is expected to remain dry. The zero-degree level will lie at 3000 m. The danger of dry-snow avalanches is not expected to change significantly. The danger of wet-snow avalanches will be subject to a daytime danger cycle, more than during the last few days. Wednesday Particularly during the nighttime hours on Tuesday, precipitation is anticipated over widespread areas, most of all on the northern flank of the Alps. The snowfall level will lie temporarily at 1800 m. At heightened altitudes, 20 to 40 cm of fresh snowfall is anticipated in the major areas of precipitation. During the daytime hours on Wednesday, skies in the eastern regions will remain predominantly overcast accompanied by showers, in the western and the southern regions it will be partly sunny. Winds will shift from westerly to northwesterly and intensify significantly at high altitudes in particular. The danger of dry-snow avalanches will increase at high altitudes on the northern Alpine Ridge more than anywhere else. The danger of wet-snow avalanches will diminish. Gliding avalanches remain possible at any time of day or night.