Lower Tauern South

Reduced outgoing longwave radiation at night, soaking through rain during the day

Reduced outgoing longwave radiation at night prevents the formation of a stable melt-freeze crust. The snowpack consists of compact snow characterised by rain, but on shady slopes from around 2200 metres there are still weak layers of deep frost in the old snowpack close to the ground. The snowpack is moist to wet up to high altitudes. Low and sunny slopes are snowed out.

Reduced outgoing longwave radiation at night, soaking through rain during the day

The avalanche risk is moderate. Spontaneous wet snow avalanches are possible where there is still a lot of snow, i.e. on shady slopes at higher altitudes and on the remaining eastern and western slopes. Avalanches can occur spontaneously or be triggered by winter sports. They usually remain medium in size, but with the accumulation of wet snow and tearing through to weak layers close to the ground, large avalanches are conceivable in exceptional cases. Uncharacteristically long run-out lengths threaten open terrain.

Trigger points for dry old snow avalanches are only present in a few high-altitude locations in the extended northern sector. Above 2200m, fresh wind slab forms with the snowfall. Mostly small avalanches can be triggered there in places by slight additional load, be aware of the risk of falling.

The cumulus clouds will dissipate during the night to Sunday. In the second half of the night, however, extensive clouds will spread again. On Sunday, too, many clouds will move through with a freshening north-westerly wind. In the morning, it may rain and snow a little at times in the northern Alps. In the afternoon, rain showers, snow showers and thunderstorms in the northern Alps. Around 10 cm of new fallen snow will accumulate at high altitudes by the evening, which will be deposited very differently by the wind. It will cool down in the afternoon, with the temperature dropping from 5 to 1 degree at 2000 metres and around -3 degrees at 3000 metres. The snowfall level will drop from 2200 to around 1800 metres during the day. The wind will be light for the time being, shifting to the north-west and freshening from midday.

The outgoing longwave radiation at night is limited and it is slightly cooler. The danger of wet avalanches remains.