Central Prealps
Stoos
Avalanche Problems
No distinct problem
1
Field notes
SLF uses this label when no single problem dominates the assessment, often on lower-danger days. It doesn't mean conditions are safe: any avalanche type is still possible, and normal caution applies. On stable days this is usually a signal to enjoy the mountains with general awareness; on less-stable days where the assessment is still inconclusive, it's a signal to be cautious specifically because there's no clear pattern to follow.
Wet snow
1
Field notes
Rolling snowballs, deep penetration when you step or ski, and small natural slides are clear signals that the Snow deposited on the ground in a multiplicity of layers.EAWS glossary is losing strength. After a clear, cold night the surface often freezes into a strong supporting Layer of hard-compacted snow resulting from a melt-freeze process or wind.EAWS glossary, and conditions are favourable in the early morning. After a warm, overcast night, the problem may be present from the start of the day. Plan early returns and watch the runout zones below you.
Snowpack & Weather
Snowpack
Sunday’s fresh and drifted snow has bonded well with the existing snow surface. Especially in the regions exposed to the most precipitation in southern Grisons, avalanches may in places still be triggered in fresh and drifted snow.
In particular on north-facing slopes above approximately 2800 m and generally in the Areas above approximately 3000 m (particularly glaciated areas).EAWS glossary, near-ground layers have become faceted. As demonstrated by avalanches that have been triggered, in these regions avalanches can start in the Snow layers deposited from earlier precipitation, prior to fresh fallen snow. Old snow layers consist of metamorphosed snow crystals.EAWS glossary and sometimes become large.
As a result of sunshine and warming temperatures during the day, gliding avalanches and loose snow avalanches are to be expected.
Weather review for Monday
Precipitation ended early on Monday morning. Towards the end of the precipitation the snowfall level dropped to 1500 m. During the day, conditions were mostly sunny with some low cumulus clouds.
Fresh snow
From Saturday evening until precipitation stopped on Monday morning, in the north above approximately 2500 m, in the south above approximately 2800 m:
- Avers, Val Bregaglia, Bernina region: 30 to 40 cm
- northern Alpine ridge, Grisons: 15 to 30 cm
- Less elsewhere
Temperature
At midday at 2000 m, around -1 °C in the north and +2 °C in the south
Wind
Strong during the night to Monday in the south and at high altitudes, elsewhere light to moderate northwesterly to northerly
Weather forecast to Tuesday
In the mountains conditions will be mostly sunny and very mild. The zero-degree level will rise to 3600 m.
Fresh snow
-
Temperature
At midday at 2000 m, around +8 °C in the north and +6 °C in the south
Wind
Light
Outlook
Apart from sometimes dense cloud cover, conditions will be mostly sunny in the mountains on Wednesday and Thursday. It will remain very mild. The zero-degree level will be between 3400 m and 3800 m. The southwesterly wind will be light to moderate.
Avalanche risk will decrease.