{"type": "Feature", "geometry": null, "properties": {"lang": "en", "regions": [{"name": "unteres Puschlav", "regionID": "CH-7222"}, {"name": "Corvatsch", "regionID": "CH-7111"}, {"name": "Zermatt", "regionID": "CH-4222"}, {"name": "Bergell", "regionID": "CH-7211"}, {"name": "Riederalp", "regionID": "CH-4214"}, {"name": "untere Vispert\u00e4ler", "regionID": "CH-4221"}, {"name": "untere Leventina", "regionID": "CH-6115"}, {"name": "Bleniotal", "regionID": "CH-6113"}, {"name": "Rheinwald", "regionID": "CH-5223"}, {"name": "Bernina", "regionID": "CH-7112"}, {"name": "Val d'Entremont-Val Ferret", "regionID": "CH-4113"}, {"name": "Bivio", "regionID": "CH-5234"}, {"name": "basso Moesano", "regionID": "CH-6212"}, {"name": "Riviera", "regionID": "CH-6122"}, {"name": "Reckingen", "regionID": "CH-4241"}, {"name": "alto Moesano", "regionID": "CH-6211"}, {"name": "Avers", "regionID": "CH-5233"}, {"name": "Monte Rosa", "regionID": "CH-4224"}, {"name": "Arolla", "regionID": "CH-4123"}, {"name": "oberes Puschlav", "regionID": "CH-7221"}, {"name": "s\u00fcdliches Tujetsch", "regionID": "CH-5212"}, {"name": "n\u00f6rdliches Obergoms", "regionID": "CH-4243"}, {"name": "Mountet", "regionID": "CH-4125"}, {"name": "s\u00fcdliches Urseren", "regionID": "CH-2224"}, {"name": "Haut Val de Bagnes", "regionID": "CH-4116"}, {"name": "untere Maggiat\u00e4ler", "regionID": "CH-6121"}], "tendency": [{"comment": "<h1>Outlook</h1><h2>Tuesday</h2><p>Conditions will be sunny in the mountains. The upper limit for low stratus cloud will rise to between 1400 and 1700 m in the north. The zero-degree level will drop to around 1800 m in the west and south and towards 1000 m in the north and east. The northerly wind will freshen, becoming moderate to strong. Moderate Bise wind in the Prealps. Freshly drifted snow will somewhat increase avalanche risk, especially on the Main Alpine Ridge in Upper Valais and in Ticino.</p><h2>Wednesday</h2><p>Conditions will be sunny in the mountains. The Bise wind and foehn wind from the north will ease. There will be a moderate northerly wind at high altitudes. There will be hardly any change in avalanche risk.</p>"}], "validTime": {"endTime": "2025-12-29T16:00:00Z", "startTime": "2025-12-29T07:00:00Z"}, "bulletinID": "86160637-ea86-473e-a8d1-c36dcb1bd83f", "customData": {"CH": {"aggregation": [{"category": "dry", "problemTypes": ["wind_slab", "persistent_weak_layers"], "validTimePeriod": "all_day"}]}}, "nextUpdate": "2025-12-29T16:00:00Z", "unscheduled": false, "dangerRatings": [{"mainValue": "moderate", "customData": {"CH": {"subdivision": "neutral"}}, "validTimePeriod": "all_day"}], "weatherReview": {"comment": "<h1>Weather review for Sunday</h1><p>After a clear night, conditions were sunny and very mild in the mountains.</p><h2 contenteditable=\"false\">Fresh snow</h2><p>-</p><h2>Temperature</h2><p>At midday at 2000 m around +6\u00b0C in the north and east and around +8\u00b0C in the south.</p><h2>Wind</h2><p>Moderate northeasterly to easterly, easing somewhat over the course of the day.</p>"}, "publicationTime": "2025-12-29T05:54:45.552939645Z", "weatherForecast": {"comment": "<h1>Weather forecast to Monday</h1><p>After a clear night, conditions will be sunny and mild in the mountains.</p><h2 contenteditable=\"false\">Fresh snow</h2><p>-</p><h2 contenteditable=\"false\">Temperature</h2><p>At midday at 2000 m, around +4\u00b0C</p><h2>Wind</h2><p>Light to moderate from westerly directions</p>"}, "avalancheProblems": [{"aspects": ["N", "NE", "E", "SW", "W", "NW"], "comment": "The mostly small wind slabs of the last few days are lying on top of a weakly bonded old snowpack on shady slopes. Isolated whumpfing sounds and shooting cracks when stepping on the snowpack can indicate the danger. Avalanches can in some places be released by a single winter sport participant and reach medium size. Backcountry touring calls for careful route selection.", "elevation": {"lowerBound": "2400"}, "customData": {"CH": {"subdivision": "neutral", "coreZoneText": "Danger level \"moderate\" (2=) in southwest to north to east facing aspects above 2400m."}}, "problemType": "wind_slab", "validTimePeriod": "all_day", "dangerRatingValue": "moderate"}, {"aspects": ["N", "NE", "E", "SW", "W", "NW"], "comment": "The mostly small wind slabs of the last few days are lying on top of a weakly bonded old snowpack on shady slopes. Isolated whumpfing sounds and shooting cracks when stepping on the snowpack can indicate the danger. Avalanches can in some places be released by a single winter sport participant and reach medium size. Backcountry touring calls for careful route selection.", "elevation": {"lowerBound": "2400"}, "customData": {"CH": {"subdivision": "neutral", "coreZoneText": "Danger level \"moderate\" (2=) in southwest to north to east facing aspects above 2400m."}}, "problemType": "persistent_weak_layers", "validTimePeriod": "all_day", "dangerRatingValue": "moderate"}], "snowpackStructure": {"comment": "<h1>Snowpack</h1><p>There is appreciably less snow than usual at this time of year in most regions and snow conditions for ski touring are very poor in many places, especially below 2000 m and generally in the east.</p><p>Snowpack structure is variable from region to region:</p><ul><li>On the Main Alpine Ridge in Valais and on the central southern flank of the Alps, last week\u2019s fresh and drifted snow has been deposited on a thin but weak old snowpack of faceted crystals. A few avalanches, some large, have been triggered by human activity over the last few days. Isolated avalanches may still be triggered in the old snowpack in these regions. Sunday\u2019s northeasterly winds have produced snowdrift accumulations, some prone to triggering, especially adjacent to ridgelines.</li><li>In central Valais, northern Upper Valais and throughout Grisons, weak layers of faceted crystals or surface hoar are present in the snowpack on shady slopes above approximately 2400 m. Although some of these weak layers have proven triggerable in stability tests, very few avalanches have actually been triggered. Small avalanches are possible where the last few days\u2019 snowdrift accumulations are lying on the weak snowpack. On wind-protected shady slopes, the surface of the snowpack is faceted and loose.</li><li>Snowpack structure is more favourable in the westernmost and northern parts of Lower Valais and on the northern flank of the Alps. Small snowdrift accumulations have formed locally. Below 2400 m, the snowpack has mostly frozen solid.</li></ul>"}}}