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Avalanche bulletin through Sunday, 17 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: Sa. 16.11., 17:00 Next update: Su. 17.11., 17:00 Validity

Avalanche bulletin through Sunday, 17 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 Sa. 16.11., 17:00 Next update Su. 17.11., 18:00 Validity

Avalanche bulletin through Sunday, 17 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 Sa. 16.11., 17:00 Next update Su. 17.11., 17:00 Validity

Avalanche bulletin through Sunday, 17 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 Sa. 16.11., 17:00 Next update Su. 17.11., 17:00 Validity

 
Level 4, high

Fresh snow

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

Much of the fresh and wind-drifted snow represent the main danger. As a consequence of fresh snow and stormy weather natural avalanches are to be expected from the late morning, even very large ones in isolated cases. In the late morning danger level 4 (high) will be reached. In the typical avalanche paths avalanches can reach intermediate altitudes. Exposed parts of transportation routes can be endangered. The conditions are very critical for backcountry touring and snowshoe hiking outside marked and open pistes.

Gliding avalanches

Gliding avalanches are to be expected on very steep grassy slopes.

see also snowpack and weather

Level 3, considerable

Fresh snow

Avalanche prone locations
In all aspects above approximately 2200m.

In all aspects above approximately 2200m.

Danger description

The fresh snow represents the main danger. As a consequence of a strong to storm force southeasterly wind, wind slabs will form. Avalanches can be released by a single winter sport participant. 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 southwest to north to east facing aspects above approximately 2000m.

In particular in southwest to north to east facing aspects above approximately 2000m.

Danger description

The fresh and older 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 number and size of avalanche prone locations will increase with altitude. The wind slabs are to be evaluated with care and prudence in steep terrain.

see also snowpack and weather

Level 3, considerable

Fresh snow

Avalanche prone locations
In all aspects above approximately 2000m.

In all aspects above approximately 2000m.

Danger description

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

Gliding avalanches

Gliding avalanches are to be expected on very steep grassy slopes.

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: 16.11.2019, 17:00 / Next update: 17.11.2019, 18:00
Snowpack
In the southern regions, the great masses of fresh snow from the last few days are settling and consolidating. However on Sunday, a new round of snowfall is expected to be added to it. In the northern regions, combs and summits will be blown free of snow and the snowdrifts will be deposited in gullies and bowls far distant from ridges more than anywhere else. The snow depths in flat-field measurement zones at 2500 m altitude on the Main Alpine Ridge from Monte Rosa into the Bernina region and southwards therefrom amount to 80 to 120 cm over widespread areas; in the remaining parts of the Main Alpine Ridge and in the regions bordering to the north, as well as in the northern part of Lower Valais and in Grisons south of the Anterior Rhine, 50 to 80 cm of snow has been registered. Further to the north, there is less snow.
On Sunday, as a result of easterly to southerly winds, the fresh fallen snow in particular will be transported.
Observed weather on Saturday, 16.11.2019
On the Main Alpine Ridge from the Simplon region into the Upper Engadine and southwards therefrom, skies were heavily overcast and during the nocturnal hours there was persistent snowfall above approximately 1200 m. During the daytime in the Simplon and Gotthard regions, as well as in the central sector of the southern flank of the Alps, there was a small amount of snowfall in the form of snow showers. In the other regions of Switzerland it was quite sunny in all regions, accompanied by cloudbanks.
Fresh snow
Since Friday evening on the southern flank of the Alps and in the southern part of central Grisons, an additional 10 to 20 cm of fresh snow was registered; in the Upper Engadine, as much as 30 cm of fresh snow. All in all, between Thursday evening and Saturday evening, in the southern regions above approximately 1400 m, in the northern regions above approximately 1800 m, the following amounts of fresh snow have been registered:
  • Simplon region, southern Goms, southern regions of Urseren and Tavetsch, southern flank of the Alps not including Val Müstair and Upper Engadine: 60 to 80 cm, in the Simplon region and Bedretto valley as much as 100 cm;
  • remaining regions of the Main Alpine Ridge from the Matterhorn as far as Oberalp Pass, Aletsch region, central Grisons: 40 to 60 cm;
  • Lower Valais sector of the Main Alpine Ridge, regions bordering to the north of the Main Alpine Ridge, remaining regions of Grisons: 20 to 40 cm;
  • in the other regions of Switzerland, 10 to 20 cm; in the Prealps, only a few centimetres, or else it remained dry.
Temperature
At midday at 2000 m between -4 °C in the western and the southern regions and -2 °C in the eastern regions.
Wind
At high altitudes, winds were blowing at moderate to strong velocity, in the other regions at light to moderate strength, from the south.
Weather forecast through Sunday, 17.11.2019
On Saturday night, skies will become increasingly overcast from the southeast and snowfall is expected to set in over widespread areas which will subsequently slacken off in the afternoon. The snowfall level in the northern regions will be below 1000 m, in the southern regions the snowfall level will ascend to approximately 1500 m during the course of the day. The precipitation can be intermittently intensive and heavy in the Upper Engadine; however, the amounts of anticipated precipitation are still difficult to forecast.
Fresh snow
Between Saturday evening and Sunday evening:
  • Upper Engadine, Val Bregaglia, Val Poschiavo: 30 to 50 cm;
  • remaining regions of the Main Alpine Ridge from Monte Rosa into the Engadine and southwards therefrom, Aletsch region, central Grisons, Lower Engadine: 20 to 30 cm;
  • remaining regions of Switzerland: 10 to 20 cm; in the furthermost western regions, 5 to 10 cm.
Temperature
At midday at 2000 m, -6 °C in the western regions, -3 °C in the eastern regions and -2 °C in the southern regions.
Wind
  • Winds during the nocturnal hours will be easterly to northeasterly blowing at moderate strength, blowing at strong velocity in the northern and eastern regions;
  • during the daytime in southern regions blowing at strong to storm-strength from southeasterly directions, in the western regions blowing at moderate strength from varying directions.
Outlook through Tuesday, 19.11.2019
In the southern regions, skies on both days will be heavily overcast for the most part and repeated minor bouts of snowfall are anticipated above 1000 m. On Monday in the northern regions, skies will initially still be overcast, accompanied by a final round of snowflakes above 600 m, subsequently from the west it will become increasingly sunny during the course of the day. On Tuesday in the eastern regions, skies will be overcast to start with, subsequently it will turn predominantly sunny, as in the western regions.
The avalanche danger levels are expected to decrease. In the southeastern regions, avalanche danger could increase again somewhat on Tuesday.
 

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: 16.11.2019, 17:00 / Next update: 17.11.2019, 18:00
Snowpack
In the southern regions, the great masses of fresh snow from the last few days are settling and consolidating. However on Sunday, a new round of snowfall is expected to be added to it. In the northern regions, combs and summits will be blown free of snow and the snowdrifts will be deposited in gullies and bowls far distant from ridges more than anywhere else. The snow depths in flat-field measurement zones at 2500 m altitude on the Main Alpine Ridge from Monte Rosa into the Bernina region and southwards therefrom amount to 80 to 120 cm over widespread areas; in the remaining parts of the Main Alpine Ridge and in the regions bordering to the north, as well as in the northern part of Lower Valais and in Grisons south of the Anterior Rhine, 50 to 80 cm of snow has been registered. Further to the north, there is less snow.
On Sunday, as a result of easterly to southerly winds, the fresh fallen snow in particular will be transported.
Observed weather on Saturday, 16.11.2019
On the Main Alpine Ridge from the Simplon region into the Upper Engadine and southwards therefrom, skies were heavily overcast and during the nocturnal hours there was persistent snowfall above approximately 1200 m. During the daytime in the Simplon and Gotthard regions, as well as in the central sector of the southern flank of the Alps, there was a small amount of snowfall in the form of snow showers. In the other regions of Switzerland it was quite sunny in all regions, accompanied by cloudbanks.
Fresh snow
Since Friday evening on the southern flank of the Alps and in the southern part of central Grisons, an additional 10 to 20 cm of fresh snow was registered; in the Upper Engadine, as much as 30 cm of fresh snow. All in all, between Thursday evening and Saturday evening, in the southern regions above approximately 1400 m, in the northern regions above approximately 1800 m, the following amounts of fresh snow have been registered:
  • Simplon region, southern Goms, southern regions of Urseren and Tavetsch, southern flank of the Alps not including Val Müstair and Upper Engadine: 60 to 80 cm, in the Simplon region and Bedretto valley as much as 100 cm;
  • remaining regions of the Main Alpine Ridge from the Matterhorn as far as Oberalp Pass, Aletsch region, central Grisons: 40 to 60 cm;
  • Lower Valais sector of the Main Alpine Ridge, regions bordering to the north of the Main Alpine Ridge, remaining regions of Grisons: 20 to 40 cm;
  • in the other regions of Switzerland, 10 to 20 cm; in the Prealps, only a few centimetres, or else it remained dry.
Temperature
At midday at 2000 m between -4 °C in the western and the southern regions and -2 °C in the eastern regions.
Wind
At high altitudes, winds were blowing at moderate to strong velocity, in the other regions at light to moderate strength, from the south.
Weather forecast through Sunday, 17.11.2019
On Saturday night, skies will become increasingly overcast from the southeast and snowfall is expected to set in over widespread areas which will subsequently slacken off in the afternoon. The snowfall level in the northern regions will be below 1000 m, in the southern regions the snowfall level will ascend to approximately 1500 m during the course of the day. The precipitation can be intermittently intensive and heavy in the Upper Engadine; however, the amounts of anticipated precipitation are still difficult to forecast.
Fresh snow
Between Saturday evening and Sunday evening:
  • Upper Engadine, Val Bregaglia, Val Poschiavo: 30 to 50 cm;
  • remaining regions of the Main Alpine Ridge from Monte Rosa into the Engadine and southwards therefrom, Aletsch region, central Grisons, Lower Engadine: 20 to 30 cm;
  • remaining regions of Switzerland: 10 to 20 cm; in the furthermost western regions, 5 to 10 cm.
Temperature
At midday at 2000 m, -6 °C in the western regions, -3 °C in the eastern regions and -2 °C in the southern regions.
Wind
  • Winds during the nocturnal hours will be easterly to northeasterly blowing at moderate strength, blowing at strong velocity in the northern and eastern regions;
  • during the daytime in southern regions blowing at strong to storm-strength from southeasterly directions, in the western regions blowing at moderate strength from varying directions.
Outlook through Tuesday, 19.11.2019
In the southern regions, skies on both days will be heavily overcast for the most part and repeated minor bouts of snowfall are anticipated above 1000 m. On Monday in the northern regions, skies will initially still be overcast, accompanied by a final round of snowflakes above 600 m, subsequently from the west it will become increasingly sunny during the course of the day. On Tuesday in the eastern regions, skies will be overcast to start with, subsequently it will turn predominantly sunny, as in the western regions.
The avalanche danger levels are expected to decrease. In the southeastern regions, avalanche danger could increase again somewhat on Tuesday.

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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