Friday, 8 November 2019

Caution urged at high altitudes and in high alpine zones: heightened likelihood of avalanche accidents after stormy period followed by weather improvement

Just to round out the last blog entry:

In the mountains of the Europaregion there is already snow in the heights:

Webcam photo from Pejo 3000 m towards Rifugio Vioz-Mantova (07.11.2019)

The bad-weather front arrived from the south.

Animated depiction of the Zugspitze webcam of the bad-weather front approaching from the south.

Throughout the Europaregion Tirol/South Tirol/Trentino it has been raining or snowing, with the amounts of accumlating precipitation significantly increasing from north to south.

Precipitation in the last 24 hours (recorded 08.11.2019, 1:50 pm) in South Tirol

Snowfall in rearmost Stubai Valley (Photo: 08.11.2019)

The storm-strength southerly wind in the mountains since 7 November is also impressive.

Weather station Patscherkofel: cold front passes through, little northerly wind (blue). Subsequently: rising temperatures and increasing wind impact from the south.

Snow transport in the mountains (Tux Alps) Photo: 07.11.2019

The accumulated amounts of precipitation turned out to be less than those anticipated in the forecasts. Nevertheless, there was 50 cm of fresh snow registered in the high alpine regions of the South, in Trentino as much as 80 cm from place to place. Snowfall-plus-wind leads to correspondingly far-reaching snow transport. We expect some naturally triggered avalanches during this stormy period, particularly in high alpine shady terrain, most of all near to ridges on leeward, very steep slopes. 

In view of the significant improvement in weather conditions expected this coming Sunday, 10 November, we permit ourselves to point out that the first fine-weather day following a stormy period of snowfall tends to be laden with accidents. Even if it is only the beginning of November, winter conditions prevail in the high alpine regions, including potential danger of triggering slab avalanches. Even the weight of one sole winter sports participant is sufficient to trigger a slab avalanche.

The first reports about glide-snow slides which are occurring ever more frequently on grass-covered slopes are highly indicative.

Numerous glide-snow slides on steep grass-covered slopes in the Tux Alps (Photo: 07.11.2019)


Glide-snow slide in the Lasörling Massif in East Tirol (Photo: 06.11.2019)