Bollettino valanghe

Isolated naturally triggered avalanches possible

Isolated naturally triggered avalanches possible

Due to fresh snow, likelihood of slab avalanches above 1800m. Avalanches can trigger in gullies, bowls, behind protruberances in the terrain in the near-surface layers, even by one sole skier. Also isolated naturally triggered avalanches are possible, more so if the precipitation intensifies, esp. at the foot of rock walls. Avalanches can trigger in the old snowpack and grow to medium size. Whumpf noises and naturally triggered releases are alarm signals, indicators of imminent danger. Below 1800m: naturally triggered wet-snow avalanche activity will increase with the beginning of rainfall. In starting zones which have not yet discharged, small-to-medium wet loose-snow avalanches are possible,. The runout zones should be circumvented, esp. on extremely steep slopes below 1800m in all aspects, esp in the afternoon in case of extended bright intervals.

Since Monday, especially along the Italian border, about 40-50 cm of fresh snow was registered above 2000m, locally more. Above 1600m 10-20cm of fresh snow is anticipated widespread. Winds will transport the fresh snow. Fresh snow and drifts will be deposited on shady slopes above 2000m atop an unfavorable old snowpack surface. There are expansively metamorphosed layers deeply embedded inside the snowpack, esp above 2000m. Below 2000m: rainfall in all aspects will lead to increasing wettening of the snowpack below 1800m. Nocturnal outgoing longwave radiation is heavily reduced.

On Thursday, cloudy and variable weather conditions will continue, initially a few light showers with snowfall level at 900-1300m, which will then rapidly ascend to over 1400m. As evening approaches, tendency towards showers will increase. Winds in high-alpine terrain will be strong to stormy from the southwest, gusts reaching 80 km/hr. At 2000M: -1 degree. Source: GeoSphere Austria

Increasing avalanche danger