{"type": "Feature", "geometry": null, "properties": {"lang": "en", "regions": [{"name": "unteres Puschlav", "regionID": "CH-7222"}, {"name": "Corvatsch", "regionID": "CH-7111"}, {"name": "Binntal", "regionID": "CH-4242"}, {"name": "Zermatt", "regionID": "CH-4222"}, {"name": "Bergell", "regionID": "CH-7211"}, {"name": "Saas Fee", "regionID": "CH-4223"}, {"name": "Riederalp", "regionID": "CH-4214"}, {"name": "untere Vispert\u00e4ler", "regionID": "CH-4221"}, {"name": "Mattmark", "regionID": "CH-4225"}, {"name": "s\u00fcdliches Simplon Gebiet", "regionID": "CH-4232"}, {"name": "Bedrettotal", "regionID": "CH-6111"}, {"name": "Rheinwald", "regionID": "CH-5223"}, {"name": "Val d'Anniviers", "regionID": "CH-4124"}, {"name": "Bernina", "regionID": "CH-7112"}, {"name": "s\u00fcdliches Obergoms", "regionID": "CH-4244"}, {"name": "n\u00f6rdliches Simplon Gebiet", "regionID": "CH-4231"}, {"name": "Reckingen", "regionID": "CH-4241"}, {"name": "alto Moesano", "regionID": "CH-6211"}, {"name": "Avers", "regionID": "CH-5233"}, {"name": "Val d'H\u00e9rens", "regionID": "CH-4122"}, {"name": "Monte Rosa", "regionID": "CH-4224"}, {"name": "Arolla", "regionID": "CH-4123"}, {"name": "oberes Puschlav", "regionID": "CH-7221"}, {"name": "Leuk", "regionID": "CH-4215"}, {"name": "Martigny-Verbier", "regionID": "CH-4115"}, {"name": "Mountet", "regionID": "CH-4125"}, {"name": "Turtmanntal", "regionID": "CH-4212"}, {"name": "Haut Val de Bagnes", "regionID": "CH-4116"}], "tendency": [{"comment": "<h1>Outlook</h1><h2>Wednesday</h2><p>Overnight to Wednesday there will be cloudy intervals. During the day, it will be very sunny despite patchy cloud. Winds will be light to moderate from westerly directions.</p><p>The danger of dry avalanches will decrease. In high Alpine regions, however, caution will still be required. The danger of wet avalanches will increase slightly as the day progresses.</p><h2>Thursday</h2><p>There will be clear spells overnight to Thursday. During the day there will be patchy to heavy cloud cover, with some precipitation at times. The snowfall level will be between 1400 m in the north and 1800 m in the south. The wind will mostly be a moderate south-westerly, strong at times in the north.</p><p>There will be no significant change in dry avalanche danger. Especially in Valais, there will be a possibility of isolated wet avalanches as the day progresses.</p>"}], "validTime": {"endTime": "2026-05-12T15:00:00Z", "startTime": "2026-05-11T15:00:00Z"}, "bulletinID": "80699f4a-40d1-4954-a59b-f039a6abacd4", "customData": {"CH": {"aggregation": [{"title": "Dry avalanches", "category": "dry", "problemTypes": ["wind_slab", "persistent_weak_layers"], "validTimePeriod": "all_day"}, {"title": "Wet-snow avalanches", "category": "wet", "problemTypes": ["wet_snow"], "validTimePeriod": "all_day"}]}}, "nextUpdate": "2026-05-12T15:00:00Z", "unscheduled": false, "dangerRatings": [{"mainValue": "considerable", "customData": {"CH": {"subdivision": "minus"}}, "validTimePeriod": "all_day"}], "weatherReview": {"comment": "<h1>Weather review for Monday</h1><p>Conditions were very cloudy with repeated precipitation. The snowfall level was initially around 2500 m but fell to 1800 m in the north in the afternoon.</p><h2>Fresh snow</h2><p>From Sunday evening to Monday evening above approximately 2800 m:</p><ul><li>northern and extreme west of Lower Valais, Vaud Alps and from Avers to the Bernina region: 20 to 30 cm</li><li>elsewhere a widespread 5 to 15 cm</li></ul><h2 contenteditable=\"false\">Temperature</h2><p>At midday at 2000 m, around +3 \u00b0C</p><h2>Wind</h2><ul><li>Initially mostly moderate southwesterly</li><li>In the afternoon strong at times from westerly directions</li></ul>"}, "publicationTime": "2026-05-11T15:00:00Z", "weatherForecast": {"comment": "<h1>Weather forecast to Tuesday</h1><p>Until Tuesday morning there will be widespread precipitation in the north. The snowfall level will drop from 1800 m to around 1200 m. During the day conditions will be mostly sunny in the south and in Valais. The central and eastern parts of the northern flank of the Alps will see extensive cloud cover until the afternoon, with the possibility of isolated showers.</p><h2 contenteditable=\"false\">Fresh snow</h2><p>From Monday evening to Tuesday midday above approximately 2200 m:</p><ul><li>northern and extreme west of Valais and northern flank of the Alps: 20 to 40 cm</li><li>rest of Valais and northern Grisons: 10 to 20 cm</li><li>less elsewhere; dry in the south</li></ul><h2>Temperature</h2><p>At midday at 2000 m, between +1 \u00b0C in the southwest and -3 \u00b0C in the northeast</p><h2>Wind</h2><ul><li>During the night moderate to strong from westerly directions</li><li>During the day at high altitudes and generally in the south, strong to gale-force northwesterly</li></ul>"}, "avalancheProblems": [{"aspects": ["N", "NE", "E", "SE", "S", "SW", "W", "NW"], "comment": "As a consequence of new snow and a sometimes storm force wind, avalanche prone wind slabs will form at elevated altitudes. These are to be evaluated with care and prudence in steep terrain. Avalanches can additionally be released in the old snowpack in particular on very steep north and east facing slopes. Avalanches can reach medium size. Backcountry touring calls for experience in the assessment of avalanche danger. <br/> The Avalanche Warning Service currently has only a small amount of information that has been collected in the field, so that the avalanche danger should be investigated especially thoroughly in the relevant locality.", "elevation": {"lowerBound": "2800"}, "customData": {"CH": {"subdivision": "minus", "coreZoneText": "Danger level \"considerable\" (3-) in all aspects above 2800m."}}, "problemType": "wind_slab", "validTimePeriod": "all_day", "dangerRatingValue": "considerable"}, {"aspects": ["N", "NE", "E", "SE", "S", "SW", "W", "NW"], "comment": "As a consequence of new snow and a sometimes storm force wind, avalanche prone wind slabs will form at elevated altitudes. These are to be evaluated with care and prudence in steep terrain. Avalanches can additionally be released in the old snowpack in particular on very steep north and east facing slopes. Avalanches can reach medium size. Backcountry touring calls for experience in the assessment of avalanche danger. <br/> The Avalanche Warning Service currently has only a small amount of information that has been collected in the field, so that the avalanche danger should be investigated especially thoroughly in the relevant locality.", "elevation": {"lowerBound": "2800"}, "customData": {"CH": {"subdivision": "minus", "coreZoneText": "Danger level \"considerable\" (3-) in all aspects above 2800m."}}, "problemType": "persistent_weak_layers", "validTimePeriod": "all_day", "dangerRatingValue": "considerable"}, {"comment": "As a consequence of solar radiation numerous moist loose snow avalanches are to be expected from the early morning. Apart from the danger of being buried, restraint should be exercised as well in view of the danger of avalanches sweeping people along and giving rise to falls.", "problemType": "wet_snow", "validTimePeriod": "all_day", "dangerRatingValue": "moderate"}], "snowpackStructure": {"comment": "<h1>Snowpack</h1><p>With fresh snow and gale-force westerly winds at times, Monday saw the formation of snowdrift accumulations prone to triggering. On the northern flank of the Alps and in Valais these are continuing to grow, with some becoming large, while otherwise they are mostly medium-sized. Beneath the fresh and drifted snow, the old snowpack contains coarse-grained weak layers on steep north-facing slopes at high altitudes.</p><p>Where there is sunshine, the fresh snow will make moist snow slides likely on Tuesday.</p>"}}}