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Avalanche bulletin through Saturday, 10 December 2016

Low avalanche danger will prevail

Edition: 9.12., 17:00 Next update: 10.12., 18:00 Validity

Low avalanche danger will prevail
Edition: 9.12.2016, 17:00 / Next update: 10.12.2016, 18:00
Snowpack
The uppermost surface of the snow cover displays visible and intense impact from winds over widespread areas. Only in wind-protected bowls is loosely-packed snow still to be found. On shady slopes, this loose snow has been intensely transformed to faceted crystals.
In all regions of Switzerland above approximately 2800 m on smooth, shady slopes, a weak layer composed of faceted-crystal old snow is still evident from October. Inside this layer, avalanches can still, in isolated cases, be triggered.
The snow level on north-facing slopes lies between 1600 and 2000 m, on south-facing slopes is approximately 500 m higher up.
As a result of the mild temperatures recently, together with the solar radiation, gliding avalanches are possible on very steep, south-facing slopes in isolated cases, more than anywhere else on the southern flank of the Alps.
Observed weather since Thursday, 8.12.2016
It was by and large sunny and very mild in the mountains.
Fresh snow
-
Temperature
At midday at 2000 m, +7 °C.
Wind
Winds have been westerly to northwesterly, intermittently blowing at moderate velocity.
Weather forecast through Saturday, 10.12.2016
It is expected to be sunny and mild in the mountains.
Fresh snow
-
Temperature
At midday at 2000 m, +8 °C.
Wind
Winds will be blowing from westerly directions at light strength, intermittently at moderate velocity.
Outlook through Monday, 12.12.2016
On Sunday, dense cloud cover will move in from the north. However, it is currently expected to remain dry. In inneralpine and in southern regions, it will be quite sunny. The northwesterly winds will be blowing at moderate to strong velocity. Temperatures are expected to drop significantly. On Monday morning, skies will still be partially overcast in northern regions, otherwise predominantly sunny.
The avalanche hazards could well increase somewhat on Sunday as a result of freshly formed snowdrift accumulations. On Monday, the avalanche danger is not expected to change significantly.