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Avalanche bulletin through Friday, 15 November 2019

In the south a lot of fresh snow. Outside marked and open pistes a high avalanche danger will be encountered in some regions

Edition: Th. 14.11., 17:00 Next update: Fr. 15.11., 17:00 Validity

Avalanche bulletin through Friday, 15 November 2019

In the south a lot of fresh snow. Outside marked and open pistes a high avalanche danger will be encountered in some regions

Edition Th. 14.11., 17:00 Next update Fr. 15.11., 18:00 Validity

Avalanche bulletin through Friday, 15 November 2019

In the south a lot of fresh snow. Outside marked and open pistes a high avalanche danger will be encountered in some regions

Edition Th. 14.11., 17:00 Next update Fr. 15.11., 17:00 Validity

Avalanche bulletin through Friday, 15 November 2019

In the south a lot of fresh snow. Outside marked and open pistes a high avalanche danger will be encountered in some regions

Edition Th. 14.11., 17:00 Next update Fr. 15.11., 17:00 Validity

 
Level 4, high

Fresh snow

Avalanche prone locations
In all aspects above approximately 2400m.

In all aspects above approximately 2400m.

Danger description

Much of the fresh and wind-drifted snow represent the main danger. As a consequence of the heavy snowfall more frequent natural avalanches are to be expected during the course of the night, even very large ones in isolated cases. In the typical avalanche paths they can reach intermediate altitudes. Transportation routes situated at higher altitudes in particular can be endangered occasionally. The conditions are very critical for backcountry touring and snowshoe hiking outside marked and open pistes.

Gliding avalanches

An increasing number of gliding avalanches are possible on very steep grassy slopes.

see also snowpack and weather

Level 3, considerable

Fresh snow

Avalanche prone locations
In all aspects above approximately 2400m.

In all aspects above approximately 2400m.

Danger description

The fresh snow represents the main danger. As a consequence of a strong southerly wind, avalanche prone wind slabs will form during the night as well. Avalanches can be released easily and reach large size in isolated cases. In addition individual natural avalanches are possible, this applies in particular during the night. Backcountry touring calls for experience in the assessment of avalanche danger and caution.

Gliding avalanches

Gliding avalanches are possible on very steep grassy slopes.

see also snowpack and weather

Level 2, moderate

Wind slabs

Avalanche prone locations
In particular in west to north to east facing aspects above approximately 2400m.

In particular in west to north to east facing aspects above approximately 2400m.

Danger description

The wind slabs represent the main danger. They are to be found in particular in gullies and bowls, and behind abrupt changes in the terrain. Avalanches can in some places be released by people and reach medium size. The wind slabs are to be evaluated with care and prudence.

see also snowpack and weather

Level 3, considerable

Wind slabs

Avalanche prone locations
In particular in west to north to east facing aspects above approximately 2400m.

In particular in west to north to east facing aspects above approximately 2400m.

Danger description

The fresh and older wind slabs represent the main danger. As a consequence of the sometimes storm force wind they will increase in size additionally during the night. Avalanches can be released easily and reach medium size. The wind slabs are to be avoided as far as possible. Backcountry touring calls for experience in the assessment of avalanche danger.

see also snowpack and weather

In the south a lot of fresh snow. Outside marked and open pistes a high avalanche danger will be encountered in some regions
Edition: 14.11.2019, 17:00 / Next update: 15.11.2019, 18:00
Snowpack
Above 1000 to 1500 m there is snow covering the ground over widespread areas. With snow depths of 50 to 80 cm at 2500 m, most of the snow is found on the Main Alpine Ridge from the Monte Rosa region as far as Ofen Pass. In the remaining regions of Switzerland, with the exception of glaciated high alpine zones, the snow cover is for the most part still thin and irregular. Over the last few days, loosely-packed fresh snow and old snow was initially transported by northerly winds, subsequently on Thursday by southerly winds. This snow was deposited in gullies and bowls and behind terrain rolls. On Thursday night as a result of very intensive snowfall on the Main Alpine Ridge and southwards therefrom, together with strong to storm-strength southerly winds, large-sized and area-wide snowdrift accumulations are expected to form.
Observed weather on Thursday, 14.11.2019
In the eastern regions it was quite sunny, in the other regions of Switzerland skies were heavily overcast for the most part. In the morning hours in the Jura, the Valais sector of the Main Alpine Ridge and in the western part of Ticino, light precipitation set in, which intensified as evening approached. The snowfall level in the northern regions lay at 800 to 1000 m, in the southern reigons at 600 to 800 m.
Fresh snow
By Thursday evening in the western part of the Jura, in the western sector of the Main Alpine Ridge, in the Gotthard region and in the western part of Ticino: 5 to 10 cm from place to place;
Temperature
At midday at 2000 m, between -1 °C in the foehn-influenced regions of the north; and -5 °C in the southern regions.
Wind
Winds were blowing from southerly directions,
  • at moderate to strong velocity, at strong to storm-strength in the northern sector of the Alpine Ridge,
  • in the northern Prealps and in the furthermost southern regions, at light to moderate strength.
Weather forecast through Friday, 15.11.2019
On Thursday night on the Main Alpine Ridge and southwards therefrom, persistent and heavy snowfall is anticipated. The snowfall will spread also to the regions immediately north of the Main Alpine Ridge, however the precipitation will be less intensive there. Further to the north, snowfall will tend to decrease, in the foehn-influenced regions of the north it will presumably remain dry and bright skies will prevail as a result of foehn influence. On Friday morning, the snowfall will move into the Engadine and subsequently in the other regions of Switzerland slacken off during the course of the day. The winds are also expected to slacken off somewhat. The snowfall level in the upper valleys of the Ticino will drop down to the valley floors during Thursday night. In the other regions of Switzerland the snowfall level will lie at 800 to 1000 m.
Fresh snow
Between Thursday evening and Friday evening, in the southern regions above approximately 800 m, in the northern regions above approximately 1200 m:
  • Main Alpine Ridge from Monte Rosa over the Simplon region and southern Goms into southern Urseren, upper valleys of Maggia, Main Alpine Ridge from Val Bregaglia into the Bernina region: 60 to 80 cm;
  • remaining regions of the Main Alpine Ridge from Great St. Bernard into the Upper Engadine and southwards therefrom, Riederalp region: 40 to 60 cm;
  • north of the Main Alpine Ridge and the regions bordering the Riederalp region, remaining parts of the Engadine, Val Müstair: 20 to 40 cm;
  • remaining regions of the northern flank of the Alps, of the Valais and Grisons: 10 to 20 cm, in the Prealps and in the Jura only a few centimetres, or else it will remain dry.
Temperature
At midday at 2000 m between -3 °C in the northern regions and -5 °C in the southern regions.
Wind
  • On Thursday night, strong to storm-strength winds from southerly to southeasterly directions, in the Alpine valleys of the north strong foehn wind will prevail.
  • During the course of the day, winds will slacken off somewhat, be blowing at moderate to strong velocity from southerly to southwesterly directions.
Outlook through Sunday, 17.11.2019
On Saturday on the Main Alpine Ridge and southwards therefrom, skies will be predominantly overcast and above approximately 900 m a small amount of intermittent snowfall is anticipated. In the northern regions, it will be partly sunny, accompanied by some cloudbanks. On Sunday, skies will be predominantly overcast. A small amount of intermittent snowfall is anticipated in the eastern and southern regions more than anywhere else. The snowfall level in northern regions will be at 600 m, and in southern regions at 1000 m.
The avalanche danger levels are expected to incrementally decrease. In the areas of major precipitation, hardly any naturally-triggered, dry-snow avalanches are to be expected. At high altitudes, winter sports participants and mountain climbers can still trigger avalanches, including large-sized ones in the major areas of precipitation.
 

Your observations can improve the quality of the avalanche bulletin. We are very grateful for any reports and photos received.

Please report your observations of avalanches or alarm signs, or your estimation of the avalanche danger, or simply send us a picture illustrating the current situation. Your report from the field will be considered along with all the other information when we assess the avalanche danger. It is impossible, however, to reflect the exact content of each individual report in the avalanche bulletin.

The best way to file a report is by completing the interactive form on this page. If your report is to be used in the 5 pm avalanche bulletin, it should be submitted before 2:30 pm if possible. Reports received later will normally be given consideration in the next assessment.

Other reporting options:

In the south a lot of fresh snow. Outside marked and open pistes a high avalanche danger will be encountered in some regions
Edition: 14.11.2019, 17:00 / Next update: 15.11.2019, 18:00
Snowpack
Above 1000 to 1500 m there is snow covering the ground over widespread areas. With snow depths of 50 to 80 cm at 2500 m, most of the snow is found on the Main Alpine Ridge from the Monte Rosa region as far as Ofen Pass. In the remaining regions of Switzerland, with the exception of glaciated high alpine zones, the snow cover is for the most part still thin and irregular. Over the last few days, loosely-packed fresh snow and old snow was initially transported by northerly winds, subsequently on Thursday by southerly winds. This snow was deposited in gullies and bowls and behind terrain rolls. On Thursday night as a result of very intensive snowfall on the Main Alpine Ridge and southwards therefrom, together with strong to storm-strength southerly winds, large-sized and area-wide snowdrift accumulations are expected to form.
Observed weather on Thursday, 14.11.2019
In the eastern regions it was quite sunny, in the other regions of Switzerland skies were heavily overcast for the most part. In the morning hours in the Jura, the Valais sector of the Main Alpine Ridge and in the western part of Ticino, light precipitation set in, which intensified as evening approached. The snowfall level in the northern regions lay at 800 to 1000 m, in the southern reigons at 600 to 800 m.
Fresh snow
By Thursday evening in the western part of the Jura, in the western sector of the Main Alpine Ridge, in the Gotthard region and in the western part of Ticino: 5 to 10 cm from place to place;
Temperature
At midday at 2000 m, between -1 °C in the foehn-influenced regions of the north; and -5 °C in the southern regions.
Wind
Winds were blowing from southerly directions,
  • at moderate to strong velocity, at strong to storm-strength in the northern sector of the Alpine Ridge,
  • in the northern Prealps and in the furthermost southern regions, at light to moderate strength.
Weather forecast through Friday, 15.11.2019
On Thursday night on the Main Alpine Ridge and southwards therefrom, persistent and heavy snowfall is anticipated. The snowfall will spread also to the regions immediately north of the Main Alpine Ridge, however the precipitation will be less intensive there. Further to the north, snowfall will tend to decrease, in the foehn-influenced regions of the north it will presumably remain dry and bright skies will prevail as a result of foehn influence. On Friday morning, the snowfall will move into the Engadine and subsequently in the other regions of Switzerland slacken off during the course of the day. The winds are also expected to slacken off somewhat. The snowfall level in the upper valleys of the Ticino will drop down to the valley floors during Thursday night. In the other regions of Switzerland the snowfall level will lie at 800 to 1000 m.
Fresh snow
Between Thursday evening and Friday evening, in the southern regions above approximately 800 m, in the northern regions above approximately 1200 m:
  • Main Alpine Ridge from Monte Rosa over the Simplon region and southern Goms into southern Urseren, upper valleys of Maggia, Main Alpine Ridge from Val Bregaglia into the Bernina region: 60 to 80 cm;
  • remaining regions of the Main Alpine Ridge from Great St. Bernard into the Upper Engadine and southwards therefrom, Riederalp region: 40 to 60 cm;
  • north of the Main Alpine Ridge and the regions bordering the Riederalp region, remaining parts of the Engadine, Val Müstair: 20 to 40 cm;
  • remaining regions of the northern flank of the Alps, of the Valais and Grisons: 10 to 20 cm, in the Prealps and in the Jura only a few centimetres, or else it will remain dry.
Temperature
At midday at 2000 m between -3 °C in the northern regions and -5 °C in the southern regions.
Wind
  • On Thursday night, strong to storm-strength winds from southerly to southeasterly directions, in the Alpine valleys of the north strong foehn wind will prevail.
  • During the course of the day, winds will slacken off somewhat, be blowing at moderate to strong velocity from southerly to southwesterly directions.
Outlook through Sunday, 17.11.2019
On Saturday on the Main Alpine Ridge and southwards therefrom, skies will be predominantly overcast and above approximately 900 m a small amount of intermittent snowfall is anticipated. In the northern regions, it will be partly sunny, accompanied by some cloudbanks. On Sunday, skies will be predominantly overcast. A small amount of intermittent snowfall is anticipated in the eastern and southern regions more than anywhere else. The snowfall level in northern regions will be at 600 m, and in southern regions at 1000 m.
The avalanche danger levels are expected to incrementally decrease. In the areas of major precipitation, hardly any naturally-triggered, dry-snow avalanches are to be expected. At high altitudes, winter sports participants and mountain climbers can still trigger avalanches, including large-sized ones in the major areas of precipitation.

Latest avalanche bulletins

 

Have you observed alarm signs or an avalanche?

Your observations can improve the quality of the avalanche bulletin. We are very grateful for any reports and photos received.

 

More information about observations

Please report your observations of avalanches or alarm signs, or your estimation of the avalanche danger, or simply send us a picture illustrating the current situation. Your report from the field will be considered along with all the other information when we assess the avalanche danger. It is impossible, however, to reflect the exact content of each individual report in the avalanche bulletin.

The best way to file a report is by completing the interactive form on this page. If your report is to be used in the 5 pm avalanche bulletin, it should be submitted before 2:30 pm if possible. Reports received later will normally be given consideration in the next assessment.

Other reporting options:

 

No avalanche bulletins are being published at the moment. Nevertheless, you should still stay up to date with the avalanche situation in the mountains, especially if there is fresh snow.

However, the SLF will, by way of exception, also issue avalanche bulletins in the summer in case of heavy snowfall. There are different ways you can be notified when these bulletins based on the snow situation are published:

  • by push alert on SLF's free White Risk mobile app: appearing in four languages (English, German, French and Italian), this can be downloaded from iTunes App Store (for iPhones) or Google Play Store (for Android);
  • by mobile text message (SMS): please send an SMS with the message START SLF SOMMER to the phone number 9234 – you can cancel this service at any time by sending an SMS with the message STOP SLF SOMMER; cost: CHF 0.20 per SMS;
  • via an RSS feed which informs you whenever an avalanche bulletin is published.

Depending on the snow and avalanche situation, the regular publication of avalanche bulletin recommences in November/December.

Latest avalanche bulletins

 

Have you observed alarm signs or an avalanche?

Your observations can improve the quality of the avalanche bulletin. We are very grateful for any reports and photos received.

 

More information about observations

Please report your observations of avalanches or alarm signs, or your estimation of the avalanche danger, or simply send us a picture illustrating the current situation. Your report from the field will be considered along with all the other information when we assess the avalanche danger. It is impossible, however, to reflect the exact content of each individual report in the avalanche bulletin.

The best way to file a report is by completing the interactive form on this page. If your report is to be used in the 5 pm avalanche bulletin, it should be submitted before 2:30 pm if possible. Reports received later will normally be given consideration in the next assessment.

Other reporting options:

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