Central Grisons and Anterior Rhine

Zervreila

Mon 17 Nov Sunrise 08:29 17:48 Heavy snow

Hard-to-read day. Persistent or gliding-snow problems can mask the real risk.

Day Risk Profile

Considerable
All day

Avalanche Problems

Dry snow level 3 New snow + Persistent weak layers dry All day
All aspects
above 2800m
Up to 30 cm of snow fell in the last two days above approximately 2400 m. Up to 15 cm of snow will fall until Monday. The new snow and wind slabs of the last few days are lying on top of a weakly bonded old snowpack on shady slopes. As a consequence of a sometimes strong northerly wind, further wind slabs will form as well. Avalanches can be released easily and reach large size in isolated cases. Backcountry touring calls for experience in the assessment of avalanche danger. The Avalanche Warning Service currently has only a small amount of information, so that the avalanche danger should be investigated especially thoroughly in the relevant locality.

Snowpack & Weather

Snowpack

On northern slopes, the snowline is around 2000 m and on southern slopes between 2400 m and 2800 m. At high altitudes, there are patches of continuous snowpack in gullies and bowls on shady slopes. The snow is significantly deeper above 2800 m.

On Saturday, precipitation set in in the south. Conditions had previously been generally dry and sunny in the mountains over the last two weeks. While the snow had largely melted on steep south-facing slopes at high altitudes over this period, on shady slopes and generally in the high Alpine regions, the snowpack had begun to become faceted. Distinct weak layers had formed. Avalanches can easily be triggered where fresh and drifted snow falls on this snowpack.

Outlook

A further 5 to 20 cm of snow will fall above 1000 m in the north by the night to Tuesday with sometimes strong north to northeasterly winds. On Tuesday and Wednesday, conditions will be mostly sunny with zero-degree levels between 1000 m and 1400 m. The wind will be light to moderate and shift from northeast to southwest on Wednesday.

Avalanche risk will hardly change on Tuesday and will decrease slowly on Wednesday.

Issued

17 Nov 12:32 UTC

Valid until

17 Nov 16:00 UTC

Next update

17 Nov 16:00 UTC

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