During the night into Sunday, snow will fall over a wide area; on Sunday morning, some snow will fall, mainly in the south and west. The snowfall level will be below 1000 m. On the southern flank of the Alps, 15 to 30 cm of snow is expected, further north 5 to 15 cm. The wind will be light to moderate from southerly directions on Sunday and northerly directions on Monday. The danger of dry avalanches will increase significantly in the south. In the north, the avalanche danger will not change significantly.
"}], "validTime": {"endTime": "2026-03-21T16:00:00Z", "startTime": "2026-03-21T07:00:00Z"}, "bulletinID": "7d6a415d-c348-4957-97b3-d7fd33f072ef", "customData": {"CH": {"aggregation": [{"category": "dry", "problemTypes": ["persistent_weak_layers"], "validTimePeriod": "all_day"}]}}, "nextUpdate": "2026-03-21T16:00:00Z", "unscheduled": false, "dangerRatings": [{"mainValue": "considerable", "customData": {"CH": {"subdivision": "minus"}}, "validTimePeriod": "all_day"}], "weatherReview": {"comment": "After a clear night, conditions were sunny.
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At midday at 2000 m, between +3 \u00b0C in the west and -1 \u00b0C in the east
Light to moderate from north-easterly directions
"}, "publicationTime": "2026-03-21T07:00:00Z", "weatherForecast": {"comment": "The night will be partly cloudy and outgoing longwave radiation somewhat reduced. During the day it will initially be fairly sunny; as the day progresses it will become increasingly cloudy and isolated showers are possible.
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At midday at 2000 m, around -1 \u00b0C in the west and -3 \u00b0C in the east
Mostly light, with a sometimes moderate northerly wind in the afternoon.
"}, "avalancheProblems": [{"aspects": ["N", "NE", "NW"], "comment": "In some places avalanches can be released in the old snowpack and reach large size. These avalanche prone locations are rather rare but are difficult to recognise. Caution is to be exercised in particular on little-used, rather lightly snow-covered shady slopes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack can indicate the danger. Defensive route selection is important.", "elevation": {"lowerBound": "2400"}, "customData": {"CH": {"subdivision": "minus", "coreZoneText": "Danger level \"considerable\" (3-) in northwest to north to northeast facing aspects above 2400m."}}, "problemType": "persistent_weak_layers", "validTimePeriod": "all_day", "dangerRatingValue": "considerable"}], "snowpackStructure": {"comment": "Near-surface layers on wind-protected shady slopes are lying on surface hoar in places. There are continued reports of avalanches being triggered in this weak layer. Over the course of this week, snowdrift accumulations have formed with wind from varying directions, some of which are still prone to triggering in isolated cases.
In the inneralpine regions of Valais and Grisons, the layers of fresh and drifted snow are also lying on a weak old snowpack with pronounced near-ground weak layers. Avalanches can propagate into these deep weak layers in isolated cases or can be triggered directly in deep layers. In the other regions, there are still weak layers in the near-ground old snowpack in some places on shady slopes, but they are mostly so thickly covered that they are hardly prone to triggering.
"}}}