After a clear night, conditions will initially be sunny on Saturday. Clouds will gather from the northwest in the afternoon. Conditions will remain sunny all day in the south and in Grisons. There will be light to moderate winds from northerly directions. The zero-degree level will rise to around 2000 m in the south, while in the north temperatures will remain cool with a zero-degree level of around 1200 m.
The danger of dry avalanches will fall in all regions. With solar radiation, moist snow slides are to be expected in the fresh snow during the day.
There will be heavy cloud cover in the north on Sunday and there will be a widespread 5 to 15 cm of fresh snow down to low altitudes. Conditions will be quite sunny in the south. There will be an often moderate northeasterly wind which will become strong at times at high altitudes. There will be an increasingly strong Bise wind in the Jura and the western Prealps.
There will be no significant change in avalanche danger.
", "valid_from": null, "valid_until": null, "tendency_type": null}], "tendency_lead": null, "weather_review": "There was heavy precipitation in the north. The snowfall level was around 500 m. There were sunny intervals in the far south.
From Wednesday afternoon to Thursday afternoon, the following amounts fell above 1000 m:
At midday at 2000 m, around -9 \u00b0C in the north and -4 \u00b0C in the south
Strong, and in the Jura and at high altitudes sometimes storm-force, north to northwesterly, easing off somewhat in the afternoon in the north
", "weather_forecast": "In the north, there will continue to be some widespread snowfall down to low altitudes until morning. Brighter periods will move in from the west over the course of the day. Conditions will be mosty sunny in southern Valais, Ticino and southern Grisons.
From Sunday afternoon until precipitation stops around midday on Friday, the following amounts are expected above 1000 m:
Cold, at midday at 2000 m around -10 \u00b0C in the north and -4 \u00b0C in the south
In the north, the sometimes storm-force northerly winds have been transporting the large volumes of fresh snow and, towards the south in particular, also the old snowpack. This has resulted in all regions in snowdrift accumulations that are prone to triggering; in the north these accumulations are large. Fresh and drifted snow has been deposited on variable snowpack surfaces: on north-facing slopes, especially in sheltered locations, onto very loose snow, whereas up to high altitudes on south-facing slopes often onto a crust. In many cases, the surface of the old snowpack has also been profiled by the wind and is irregular.
In the inneralpine regions of Valais and Grisons in particular, distinct weak layers remain in near-ground layers of the snowpack. In addition, near-surface layers in locations sheltered from the wind contain snow-covered surface hoar, in which avalanches have repeatedly been triggered over the last week. Given the fresh snowfall, avalanches are again likely to be triggered with increasing frequency in the old snowpack in these regions.
"}, "danger": {"key": "moderate", "number": "2", "ratings": [{"key": "moderate", "period": "all_day", "elevation": null, "subdivision": "+"}], "subdivision": "+"}, "source": "SLF", "traits": [{"prose": null, "title": "Dry avalanches", "band_id": null, "category": "dry", "problems": [{"extras": {"subdivision": "plus", "core_zone_text": "Danger level \"moderate\" (2+) in all aspects above 1400m."}, "aspects": ["N", "NE", "E", "SE", "S", "SW", "W", "NW"], "elevation": {"lower": 1400, "upper": null, "treeline": false, "treeline_side": null}, "frequency": null, "time_period": "all_day", "comment_html": "As a consequence of a strong to storm force northerly wind, avalanche prone wind slabs formed in the last two days in particular in gullies and bowls and behind abrupt changes in the terrain,, also at a distance from ridgelines. As a consequence of bise wind, further wind slabs will form. The fresh and somewhat older wind slabs are to be evaluated with care and prudence in steep terrain. Avalanches can in some cases reach medium size. 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.", "problem_type": "wind_slab", "avalanche_size": null, "avalanche_type": null, "core_zone_text": "Danger level \"moderate\" (2+) in all aspects above 1400m.", "snowpack_stability": null, "danger_rating_value": "moderate"}], "elevation": null, "geography": {"source": "problems"}, "time_period": "all_day", "danger_level": 2}, {"prose": "On steep grassy slopes gliding avalanches are to be expected, especially at intermediate altitudes. These can reach medium size.