The night to Saturday will mostly be clear. During the day, conditions will be mostly sunny with cumulus clouds in the afternoon and scattered showers. The zero-degree level will remain at around 3000 m. Skies will only occasionally be clear overnight to Sunday. During the day, there will be only occasional sunshine, with increasing showers in the north. The snowfall level will be around 2300 m.
The danger of dry avalanches will not change significantly. The avalanche situation will generally be favourable in the morning, but each day, the danger of wet avalanches will increase as the day progresses. Off-piste skiing and hut ascents should be completed in good time.
"}], "validTime": {"endTime": "2026-04-17T15:00:00Z", "startTime": "2026-04-16T15:00:00Z"}, "bulletinID": "07ab8647-b25e-42fa-8da0-d316ea0de194", "customData": {"CH": {"aggregation": [{"title": "Dry avalanches, whole day", "category": "dry", "problemTypes": ["persistent_weak_layers"], "validTimePeriod": "all_day"}, {"title": "Wet-snow avalanches, as the day progresses", "category": "wet", "problemTypes": ["wet_snow"], "validTimePeriod": "later"}]}}, "nextUpdate": "2026-04-17T15:00:00Z", "unscheduled": false, "dangerRatings": [{"mainValue": "moderate", "customData": {"CH": {"subdivision": "neutral"}}, "validTimePeriod": "all_day"}, {"mainValue": "considerable", "validTimePeriod": "later"}], "weatherReview": {"comment": "Overnight to Thursday, skies were only occasionally clear. During the day, conditions were mostly sunny in the high mountains and towards the south and increasingly sunny elsewhere.
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At midday at 2000 m, between +8 \u00b0C in the west and south and +3 \u00b0C in the east
Skies will be clear overnight to Friday, and during the day conditions will be mostly sunny with high cloud developing as the day progresses and some cumulus clouds in the afternoon.
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At midday at 2000 m, around +6 \u00b0C
Light from northerly directions
"}, "avalancheProblems": [{"aspects": ["N", "NE", "NW"], "comment": "In some places dry avalanches can be released in the old snowpack. In isolated cases avalanches are large. These avalanche prone locations are barely recognisable, even to the trained eye. Caution is to be exercised in areas where the snow cover is rather shallow in little used backcountry terrain.", "elevation": {"lowerBound": "2600"}, "customData": {"CH": {"subdivision": "neutral", "coreZoneText": "Danger level \"moderate\" (2=) in northwest to north to northeast facing aspects above 2600m."}}, "problemType": "persistent_weak_layers", "validTimePeriod": "all_day", "dangerRatingValue": "moderate"}, {"comment": "As the day progresses as a consequence of warming during the day and solar radiation there will be an increase in the danger of wet avalanches.With the mild weather, moistening of the snowpack is at an advanced stage. On south-facing slopes, the snowpack is moist up to around 3000 m, on east- and west-facing slopes up to 2500 to 2700 m, and on north-facing slopes up to around 2000 m. Initial moistening of near-ground weak layers is now reaching around 2200 to 2400 m on north-facing slopes, and 2700 m on west- and east-facing slopes, and it is especially on these aspects and at these altitudes that large and occasionally even very large wet slab avalanches may be triggered naturally. The weak layers in the old snowpack in Grisons in particular are the least deeply buried, and it is here that wet slab avalanches are most likely also to be triggered by human activity. Whumpfing sounds continue to be a possible indication of a weak snowpack.
At higher altitudes, where the snowpack is still dry, avalanches can in some places also still be triggered in the dry old snowpack or in layers closer to the surface.
"}}}