On Sunday, skies will be heavily overcast in the north, with widespread precipitation. Precipitation amounts are uncertain. Along the northern Alpine ridge and in Valais, 20 to 40 cm of fresh snow are possible at high altitudes. The snowfall level will rise from 1500 m to around 2600 m during the night leading into Sunday. In the south, it will remain mostly dry with sunny intervals. Strong to storm-force winds will blow from westerly directions.
As the snowfall level rises, the snowpack will become moist or wet up to high altitudes. Increasing numbers of small and medium-sized wet loose snow avalanches are to be expected. With new snow and wind the danger of dry avalanches will increase slightly in high alpine regions.
On Monday, skies will be cloudy at times in the north, otherwise mostly sunny. The zero degree level will rise to above 3000 m during the day. Light to moderate winds will blow from westerly directions.
The danger of dry avalanches will decrease, but only slowly in high alpine regions. With solar radiation, moist loose snow slides and avalanches are to be expected on steep slopes in high alpine regions. In addition to the danger of burial, particular attention should also be paid to the danger of being swept along and falling.
"}], "validTime": {"endTime": "2026-10-24T15:00:00Z", "startTime": "2026-10-23T15:00:00Z"}, "bulletinID": "0cb7cfee-5fd1-4ffa-a0a7-9f7361bec151", "customData": {"CH": {"aggregation": [{"category": "dry", "problemTypes": ["wind_slab"], "validTimePeriod": "all_day"}]}}, "nextUpdate": "2026-10-24T15:00:00Z", "unscheduled": true, "dangerRatings": [{"mainValue": "moderate", "customData": {"CH": {"subdivision": "minus"}}, "validTimePeriod": "all_day"}], "publicationTime": "2026-10-23T15:00:00Z", "avalancheProblems": [{"aspects": ["N", "NE", "E", "SE", "W", "NW"], "comment": "In some regions 10 to 20 cm of snow will fall on Saturday. As a consequence of a moderate to strong westerly wind, sometimes avalanche prone wind slabs will form in particular adjacent to ridgelines and in gullies and bowls as well as at elevated altitudes. These can in some places be released by people. Avalanches can reach medium size.In high alpine regions, the new snow and wind-drifted snow are mostly being deposited on a continuous snow cover. The greatest snow depths are already found along the main Alpine ridge from the Monte Rosa region to the Bernina region. Especially there, faceted weak layers are partly present in the old snowpack, so that fractures at the interface between the old and new snow are possible. Elsewhere, weak layers are to be expected mainly within the different layers of new snow and wind-drifted snow.
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