Saturday 6 April 2019

Loose-snow avalanches, fresh high-altitude drifts, isolated gliding snow

A few snapshots of the current situation

Lots of fresh snow in some southern regions

100 cm of fresh snow at 3000 m in Sölden ski area (photo: 05.04.2019)


In the meantime, weather conditions have improved. Hardly any wind (in western regions, such as here in the Silvretta, clear nighttime skies, sunshine from early morning).
In the regions with the most fresh snow, several naturally triggered slab avalanches (from fresh snowdrifts) were reported, along with numerous loose-snow avalanches. Excellent results were reported from artificial triggerings with explosives in the regions where snowfall was heaviest.

Excellent results from artificial triggerings, such as here on Stubai Glacier (photo: 05.04.2019)

Solar radiation amplifies surface bonding of fresh snow. A naturally triggered slab avalanche which unleashed in Kühtai during the morning (photo: 05.04.2019) 

Pretty impressive: loose-snow avalanches that released in the early morning hours of 5 April on Zischgeles in the Stubai Alps (photo: 05.04.2019)

Loose-snow avalanches in Deferegger mountains. Time of release: midday on 5 April 2019 due to diffuse solar radiation.

A skier triggered this moist loose-snow avalanche on the descent from Schafzoll, Stubai Alps (photo: 05.04.2019) 

Chain reaction: first, a loose-snow avalanche triggered. This triggered a surface slab avalanche. Below about 1900 m, the avalanche then swept a thoroughly wet snowpack along with it. Obernbergtal - southern Stubai Alps (photo: 05.04.2019) 

In accordance with springtime, 6 April, the freshly generated snowdrift accumulations have already settled well, easily up to 2500 m, and stabilized over widespread areas. On shady slopes, however, they can still be triggered at higher altitudes. This applies increasingly to very steep ridgeline terrain.

Elsewhere, spring is making its grand entry. Caution is urged towards the thoroughly wet snowpack. Wherever the snowpack is superficially wet, numerous loose-snow avalanches can be expected in extremely steep terrain in the regions which got the most fresh snow.

The latent danger of glide-snow avalanches persists on steep, grass-covered slopes.