Swiftly rising daytime avalanche danger. Near-surface weak layers can often be triggered by winter sports enthusiasts.
Following a night of clear skies, generally favorable backcountry touring conditions in early morning. However, avalanche danger increases rapidly due to solar radiation and daytime warming in all aspects below about 2400m, also above that altitude on very steep sun-exposed slopes. Naturally triggered avalanches can be expected; persons can trigger wet-snow slab avalanches. If near-surface avalanches fracture down to deeper layers of the snowpack they can, in isolated cases, grow to large size. In addition, winter sports enthusiasts can trigger near-surface weak layers on high-altitude shady slopes. Danger zone are impossible to recognize. Attention: danger of taking a fall on hardened snowpack surfaces on steep slopes.
Snowpack
Good nocturnal outgoing longwave radiation will generate a gradually thicker melt-freeze crust which, however, will swiftly soften up during the course of the day. At low and intermediate altitudes the snowpack, even on north-facing slopes, is thoroughly wet up to over 2000m. On high-altitude shady steep slopes there are unfavorable intermediate layers in the uppermost metre of the snowpack which in places can be triggered. A solid mid-section of compact layers inside the snowpack blankets a fundament of buried hoar and faceted crystals.
Tendency
Over the next few days, a daytime rhythm of avalanche danger will set in.
EARLIER Danger level
Avalanche Problem
Gliding snow
LATER Danger level
Avalanche Problem
Wet snow
Main danger: wet-snow avalanches
Avalanche danger is low in the morning and rises to moderate during the course of the day. On steep slopes with lots of snow and a smooth underground which have not yet discharged, glide-snow avalanches can trigger at any time of day or night in all aspects. Zones below glide cracks should be avoided. Due to daytime warming and solar radiation, wet loose-snow avalanches can trigger naturally, particularly on extremely steep slopes. Avalanches can grow to medium size and place exposed hiking trails at risk.
Snowpack
The snowpack was weakened over the last few days due to lack of nocturnal outgoing radiation, local rain showers and daytime warming. It is thoroughly wet widespread.
Tendency
Over the next few days, a daytime rhythm of avalanche danger will set in.
