Central Prealps

Gersau

Fri 24 Apr Sunrise 06:21 20:26 Clear

Stable day. Low danger and benign problems — manage as usual.

Day Risk Profile

Low
All day

Avalanche Problems

Wet snow level 1 Wet snow + Gliding snow wet All day
The early morning will see favourable conditions. As a consequence of warming during the day and solar radiation individual wet and gliding avalanches are possible. Restraint should be exercised because avalanches can sweep people along and give rise to falls.

Snowpack & Weather

Snowpack

Despite the warm temperatures, the dry air means that the surface of the snowpack will freeze during the clear night into Friday to become capable of bearing loads. Sunshine will cause it to soften quickly.

Moisture penetration into 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 mainly affects north-facing slopes between approximately 2200 and 2500 m, and east- and west-facing slopes between approximately 2500 and 2800 m. On south-facing slopes, moisture penetration into the snowpack extends as far as the high alpine regions. In Grisons, the weak layers in the old snowpack are the least deeply buried, which means that wet slab avalanches can also be triggered by human activity in some places.

Higher up, the snowpack is still dry. While there are still weak layers in the old snowpack, no dry avalanches have been reported for days.

Weather review for Thursday

After a clear night, conditions were sunny.

Fresh snow

-

Temperature

At midday at 2000 m, between +7 °C in the southwest and +4 °C in the northeast

Wind

Light to moderate northeasterly

Weather forecast to Friday

After a clear night, it will be sunny. With a zero-degree level of around 3300 m, it will be mild.

Fresh snow

-

Temperature

At midday at 2000 m, between +7 °C in the north and +9 °C in the south

Wind

Mainly light

Outlook to Sunday

The nights will be clear, the days sunny. The zero-degree level will be around 3000 m. The winds will be mostly light.

In the early morning, touring conditions will be favourable over a wide area. Each day, the danger of wet avalanches will increase appreciably as the day progresses. Tours and hut ascents should be started early and finished in good time.

Issued

23 Apr 15:00 UTC

Valid until

24 Apr 15:00 UTC

Next update

24 Apr 15:00 UTC

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