quote:'Avalanche of exceptional magnitude' cuts off Bonneval-sur-Arc with 7 m (23 ft) deep snow, France
Following record snowfall over the last few days, the village of Bonneval-sur-Arc (population 251), located in the Savoie department of the Auvergne-Rhône-Alpes region in southeastern France was cut off from the rest of the world after a massive avalanche on January 8, 2018 covered the road leading to the village with up to 7 m (23 feet) of snow.
This region is located at an elevation of 1 759 - 3 642 m (5 771 - 11 949 feet) and was under heavy snowfall for about two weeks. However, several meters of fresh snow that fell in several days on top of the old snow led to an 'avalanche of exceptional magnitude' that buried the road between Bessans and Bonneval-sur-Arc, cutting off the village and its 250 inhabitants from the rest of the world.
Alain Duclos, an expert for snow and avalanches with the department of Savoie, managed to dig his way to the village on Monday and Tuesday, January 8 and 9, under Red avalanche alerts issued by Météo-France.
"There are 4 to 7 meters [13 - 32 feet] of snow, trees and debris over a 250 meters [820 feet] long stretch of road," Duclos said. "In my 30 years of career, I have never seen something like that."
The road could be reopened on Wednesday, January 10, the county council said, adding that preventive releases of avalanches were conducted during the morning.
There are no reports of injuries and locals say their children are very happy because everyone is home playing games.
quote:Opluchting voor 13.000 ingesloten wintersporters
ZERMATT - Het lawinegevaar rond de Zwitserse stad Zermatt is enigszins afgezwakt. De 13.000 ingesloten toeristen kunnen het stadje echter nog niet met de trein verlaten. De autoriteiten werken hard aan het vrijmaken van de rails, maar de hoeveelheid sneeuw blijkt te groot om de treinen woensdag al te kunnen laten rijden.
Burgemeester Romy Bine-Hauser verklaarde woensdagochtend voor de Zwitserse radio dat de nacht zonder incidenten is verlopen. Wegwerkers hadden de rustige nacht gebruikt om zo veel mogelijk de wegen rond het stadje vrij van sneeuw te maken.
Zermatt in het bergkanton Wallis telt naast de toeristen ongeveer 6000 inwoners. De autoriteiten besloten dinsdag wegens lawinegevaar alle verkeer van en naar het stadje stil te leggen. Het trein- en wegverkeer kwam tot stilstand en skihellingen en wandelpaden werden gesloten.
Toeristen die om dringende reden weg moesten, konden tegen betaling Zermatt per helikopter verlaten.
quote:Another round of excessive snowfall for western Alps next week?
The western Alps may be in for another round of excessive snowfall next week. Latest GFS model guidance suggests a favourable pattern with a deep trough across the Alpine area.
Latest GFS model guidance suggests a large, deep trough pushing into Europe early next week – a pattern change that signals more unstable weather for the region.
This is a favourable pattern for additional snowfall across the western and southern Alps. Indeed, current GFS model guidance indicates locally more than 100-150 cm of new snow.
This is certainly an interesting possibility, however, as this is still 5-7 days away, model guidance may still change; we will be keeping an eye on further model runs and providing updates.
niet te gelovenquote:
Ahead of a fast moving mid tropospheric trough, a synoptic scale ascent, together with cooling around 500 hPa results in steepening lapse rates and marginal CAPE build up. 00 UTC soundings confirm lapse rates around 7 K/km over much of the region. As of now, scattered thunderstorms are ongoing. As 850 hPa flow reaches 20 to 25 m/s, 0-1 km bulk shear will be on the order of 10 - 15 m/s. In such conditions, an isolated event of a tornado or severe wind gust can not be ruled out. Small hail will also accompany any storm. Threat will gradually shift towards SE and will be largely over by 15 UTC as the trough crosses the Alpine range.