Reisseck Group

Increase in avalanche danger as a consequence of warming during the day and solar radiation. Weak layers in the old snowpack can still be released in isolated cases.

Increase in avalanche danger as a consequence of warming during the day and solar radiation. Weak layers in the old snowpack can still be released in isolated cases.

As a consequence of warming during the day and the solar radiation, the likelihood of wet avalanches being released will increase. This applies in all aspects below approximately 2400 m, and on south facing slopes also at elevated altitudes. Wet avalanches can occur in particular in starting zones where previous releases have taken place. Sometimes avalanches are medium-sized and can be released easily also by a single winter sport participant. In isolated cases dry avalanches can also be released in the old snowpack, this applies in case of a single winter sport participant. These avalanche prone locations are to be found in particular on very steep west, north and east facing slopes above approximately 2400 m. Especially transitions from a shallow to a deep snowpack are unfavourable. Avalanches can penetrate down to the ground and reach medium size. Restraint should be exercised because avalanches can sweep people along and give rise to falls.

Outgoing longwave radiation during the night will be quite good in some case. The surface of the snowpack will only just freeze and will already soften in the late morning. Sunshine and high temperatures will give rise to increasing and thorough wetting of the snowpack. The old wind slabs are lying on top of a weakly bonded old snowpack in particular on west, north and east facing slopes above approximately 2200 m. The snowpack will be subject to considerable local variations. On steep sunny slopes at low and intermediate altitudes hardly any snow is lying.

The avalanche danger will increase during the day.