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| 24 hrs of precipitation (as of 10.03, 19:00) which, according to ZAMG Weather Service will terminate at about midnight. |
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| Snowfall at high altitude, increasing rainfall at low and intermediate altitudes due to rising temperatures. Strong-to-stormy winds at high altitudes. Hot spot: esp. western and northern regions of North Tirol. |
This has increased avalanche danger significantly as a result, to considerable in the regions where snowfall was heaviest. We observe already this evening at high altitudes increasingly frequent naturally triggered avalanche activity. Avalanches (mostly small-sized) can be triggered by minimum additional loading. A very loose layer of fresh snow can serve as a weak layer. The slab which is necessary for slab avalanches is forming on the surface due to rising temperatures, and tomorrow due to increased solar radiation.
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| First small avalanches during heavy snowfall and rising temperatures. Silvretta. (photo: 10.03.2020) |
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| Winter sports enthusiasts triggered this slab today (10.03) with a fracture depth of 10 cm. Such a minor fracture depth indicates a very reactive weak layer (loose powder and decomposed snow). Silvretta. (photo: 10.03.2020) |
Tomorrow (11.03) we can expect more frequent superficial slab avalanches as a result of the solar radiation, especially on sunny slopes where residual cloud persists, but also on shady slopes due to diffuse radiation. This will occur increasingly in regions where precipitation was heaviest. In addition, numerous loose-snow avalanches can be expected in extremely steep terrain and isolated glide-snow avalanches on grassy slopes.
In short: whoever is in outlying terrain tomorrow needs very good knowledge of the terrain and an ability to assess the risks on-site.
In the regions where precipiation was less, the situation is better. But there, a daytime rise in avalanche danger requires caution due to higher daytime temperatures.
