Middle Lys Valley

Snowfall amounts forecast through Sunday may be locally higher, particularly at high altitude and along borders. Here the prevalence and size of the avalanche prone locations will increase.

Snowfall amounts forecast through Sunday may be locally higher, particularly at high altitude and along borders. Here the prevalence and size of the avalanche prone locations will increase.

As a consequence of new snow and a sometimes moderate southeasterly wind, further wind slabs will form by Sunday. The new snow and wind slabs of last week are lying on the unfavourable surface of an old snowpack on very steep shady slopes. In particular above approximately 2400 m these avalanche prone locations are more prevalent. They can be released by a single winter sport participant. This applies especially at transitions from a shallow to a deep snowpack, when entering gullies and bowls for example. As a consequence of the snowfall, the likelihood of avalanches being released will increase on steep slopes. Whumpfing sounds and the formation of shooting cracks when stepping on the snowpack indicate a precarious avalanche situation. Backcountry touring and other off-piste activities call for meticulous route selection.

20 to 30 cm of snow, and even more in some localities, fell in the last six days above approximately 2300 m. 10 to 30 cm of snow, and even more in some localities, will fall until Sunday above approximately 2000 m. The wind was moderate to strong. The high humditiy gave rise to moistening of the old snowpack in all aspects below approximately 2300 m. The new snow and wind slabs are lying on a crust on steep sunny slopes. Shady slopes above approximately 2300 m: The new snow of last week is lying on the unfavourable surface of an old snowpack. In all aspects less snow than usual is lying. On sunny slopes below approximately 2500 m hardly any snow is lying.

The avalanche danger will persist.