Central Grisons and Anterior Rhine

Zervreila

Fri 1 May Sunrise 06:08 20:32 Overcast

Manageable day. Moderate to considerable danger — read the terrain carefully.

Day Risk Profile

Low
All day
Moderate
Later

Avalanche Problems

Dry snow level 1 No distinct problem dry All day
N, NE, E, SE, W, NW
above 2400m
Individual avalanche prone locations for dry avalanches are to be found in particular in extremely steep terrain. In the last few days small wind slabs formed in high Alpine regions. These are to be evaluated with care and prudence. 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. 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.
Wet snow level 2 Wet snow wet Later
As the day progresses as a consequence of warming during the day and solar radiation there will be an increase in the danger. This applies in particular on very steep north facing slopes below approximately 2500 m, as well as on very steep east and west facing slopes between approximately 2500 and 3000 m. Mostly avalanches are medium-sized. Backcountry tours and ascents to alpine cabins should be started early and concluded timely.

Snowpack & Weather

Snowpack

Saturation of the snowpack is well advanced. The most precarious areas are slopes where weak layers in the old snowpack are becoming wet for the first time. At present, this is mainly affecting north-facing slopes between approximately 2200 and 2500 m, and east- and west-facing slopes between approximately 2500 and 2800 m. In many places, steep south-facing slopes are snow-free up to around 3000 m; where there is still snow, it is wet as far as the high alpine regions.

In the mostly clear overnight conditions, a load-bearing crust forms above approximately 2000 m, which softens over the course of the day.

Weather review for Thursday

It was mostly sunny in the north and cloudy in the south.

Fresh snow

A few centimetres above approximately 2400 m on the main Alpine ridge

Temperature

At midday at 2000 m, between +9 °C in the west, +6 °C in the north and +2 °C in the south.

Wind

Mainly light

Weather forecast to Friday

Conditions will be mostly clear overnight to Friday, with occasional cloud in the south, while the daytime will be mostly sunny.

Fresh snow

-

Temperature

At midday at 2000 m, between +7 °C in the north and +5 °C in the south

Wind

Light

Outlook to Sunday

The night to Saturday will mostly be clear. During the day, it will mostly be sunny but cumulus clouds will develop in the west and isolated showers are possible. There will be patchy cloud overnight to Sunday. During the day, there will be sunny intervals; in the east it will be sunny. Winds will be light to moderate from southerly directions. The zero-degree level will be around 3000 m.

Conditions will be favourable in the morning. The danger of wet avalanches will increase over the course of each day, rapidly so on Sunday due to the overnight reduction in outgoing longwave radiation.

Issued

30 Apr 15:00 UTC

Valid until

1 May 15:00 UTC

Next update

1 May 15:00 UTC

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