Navigation mit Access Keys

SLF HomeAvalanche bulletin and snow situation

Main menu

 
 

Avalanche bulletin through Thursday, 23 January 2020

Moderate avalanche danger will be encountered in some regions. Wind slabs require caution

Edition: We. 22.01., 17:00 Next update: Th. 23.01., 08:00 Validity

Avalanche bulletin through Thursday, 23 January 2020

Moderate avalanche danger will be encountered in some regions. Wind slabs require caution

Edition We. 22.01., 17:00 Next update Th. 23.01., 18:00 Validity

Avalanche bulletin through Thursday, 23 January 2020

Moderate avalanche danger will be encountered in some regions. Wind slabs require caution

Edition We. 22.01., 17:00 Next update Th. 23.01., 08:00 Validity

Avalanche bulletin through Thursday, 23 January 2020

Moderate avalanche danger will be encountered in some regions. Wind slabs require caution

Edition We. 22.01., 17:00 Next update Th. 23.01., 08:00 Validity

 
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

As a consequence of southerly wind, wind slabs formed in the last three days. This applies in particular in the regions exposed to the foehn wind as well as in high Alpine regions. The wind slabs are in some cases still prone to triggering. Mostly avalanches are rather small.
Apart from the danger of being buried, restraint should be exercised as well in view of the danger of avalanches sweeping people along and giving rise to falls.

Gliding avalanches

Individual gliding avalanches are possible, even medium-sized ones. This applies in particular on very steep sunny slopes between approximately 2000 and 2600 m. They can be released at any time of day or night. Areas with glide cracks are to be avoided as far as possible.

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 2000m.

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

Danger description

As a consequence of southerly wind, clearly visible wind slabs formed in the last three days especially in the regions exposed to the foehn wind. These are lying on the unfavourable surface of an old snowpack on wind-protected shady slopes. Even single winter sport participants can release avalanches in isolated cases, including medium-sized ones. The wind slabs are to be avoided especially in terrain where there is a danger of falling.
Backcountry touring and other off-piste activities call for careful route selection.

Gliding avalanches

Individual small and medium-sized gliding avalanches are possible. This applies in particular on very steep sunny slopes between approximately 2000 and 2600 m. They can be released at any time of day or night. Areas with glide cracks are to be avoided as far as possible.
As a consequence of warming during the day and solar radiation moist snow slides are possible. This applies on very steep sunny slopes.

see also snowpack and weather

Level 1, low

No distinct avalanche problem

Very isolated avalanche prone locations are to be found especially in extremely steep terrain. Restraint should be exercised because avalanches can sweep people along and give rise to falls.
As a consequence of warming during the day and solar radiation individual small moist avalanches are possible.

see also snowpack and weather

Level 1, low

Wind slabs

As a consequence of southerly wind, small wind slabs formed in the last three days in some localities. These are to be avoided especially in extremely steep terrain. Even a small avalanche can sweep snow sport participants along and give rise to falls. Apart from the danger of being buried, restraint should be exercised in particular in view of the danger of avalanches sweeping people along and giving rise to falls.

Gliding avalanches

Individual gliding avalanches are possible, even medium-sized ones. This applies in particular on very steep sunny slopes between approximately 2000 and 2600 m. They can be released at any time of day or night. Areas with glide cracks are to be avoided as far as possible.

see also snowpack and weather

Moderate avalanche danger will be encountered in some regions. Wind slabs require caution
Edition: 22.1.2020, 17:00 / Next update: 23.1.2020, 18:00
Snowpack
During the last few days, snowdrift accumulations have been generated on the northern flank of the Alps in particular. These drifted masses were deposited on wind-protected shady slopes, in some places atop an expansively metamorphosed (faceted) soft layer of snow. Particularly in those places, they are still prone to triggering from place to place.
The snow depths are below average over widespread areas for this juncture of the season and the snowpack is increasingly expansively metamorphosed (faceted). On wind-protected slopes where the snow is shallow, as well as in the inneralpine regions of the Valais and Grisons, the snowpack is loosely-packed all the way to the ground in some places. Stability tests showed fractures in surface-near layers in some places by medium additional loading, but generally no fractures were triggered.
Isolated gliding avalanches continue to be possible. These avalanches can release at any time of day or night.
Observed weather on Wednesday, 22.01.2020
Following a night of clear skies for the most part, it was sunny in the mountains during the daytime.
Fresh snow
-
Temperature
At midday at 2000 m, +4 °C.
Wind
Winds were southerly to southeasterly:
  • blowing at moderate to strong velocity on the northern Alpine Ridge during the night;
  • in the other regions of Switzerland blowing at light to moderate strength.
Weather forecast through Thursday, 23.01.2020
Following a night of clear skies, it will initially be sunny during the daytime. In the afternoon, high-altitude clouds will move in.
Fresh snow
-
Temperature
At midday at 2000 m in the northern regions +6 °C and in the southern regions +2 °C; zero-degree level in the northern regions will be at 3000 m.
Wind
Winds will be southerly to southwesterly:
  • blowing at moderate strength at high altitudes as well as in the foehn-influenced regions during the afternoon;
  • in the other regions of Switzerland blowing generally at light strength.
Outlook through Saturday, 25.01.2020
On Friday it will be quite sunny in spite of high-altitude cloudbanks. On Friday night and during the day on Saturday, a small amount of snowfall is possible above 1400 m.
The danger of dry-snow avalanches is expected to incrementally decrease. Isolated gliding avalanches continue to be possible.
 

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:

Moderate avalanche danger will be encountered in some regions. Wind slabs require caution
Edition: 22.1.2020, 17:00 / Next update: 23.1.2020, 18:00
Snowpack
During the last few days, snowdrift accumulations have been generated on the northern flank of the Alps in particular. These drifted masses were deposited on wind-protected shady slopes, in some places atop an expansively metamorphosed (faceted) soft layer of snow. Particularly in those places, they are still prone to triggering from place to place.
The snow depths are below average over widespread areas for this juncture of the season and the snowpack is increasingly expansively metamorphosed (faceted). On wind-protected slopes where the snow is shallow, as well as in the inneralpine regions of the Valais and Grisons, the snowpack is loosely-packed all the way to the ground in some places. Stability tests showed fractures in surface-near layers in some places by medium additional loading, but generally no fractures were triggered.
Isolated gliding avalanches continue to be possible. These avalanches can release at any time of day or night.
Observed weather on Wednesday, 22.01.2020
Following a night of clear skies for the most part, it was sunny in the mountains during the daytime.
Fresh snow
-
Temperature
At midday at 2000 m, +4 °C.
Wind
Winds were southerly to southeasterly:
  • blowing at moderate to strong velocity on the northern Alpine Ridge during the night;
  • in the other regions of Switzerland blowing at light to moderate strength.
Weather forecast through Thursday, 23.01.2020
Following a night of clear skies, it will initially be sunny during the daytime. In the afternoon, high-altitude clouds will move in.
Fresh snow
-
Temperature
At midday at 2000 m in the northern regions +6 °C and in the southern regions +2 °C; zero-degree level in the northern regions will be at 3000 m.
Wind
Winds will be southerly to southwesterly:
  • blowing at moderate strength at high altitudes as well as in the foehn-influenced regions during the afternoon;
  • in the other regions of Switzerland blowing generally at light strength.
Outlook through Saturday, 25.01.2020
On Friday it will be quite sunny in spite of high-altitude cloudbanks. On Friday night and during the day on Saturday, a small amount of snowfall is possible above 1400 m.
The danger of dry-snow avalanches is expected to incrementally decrease. Isolated gliding avalanches continue to be possible.

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.

interactive Button 'submit your observation'

 

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.

interactive Button 'submit your observation'

 

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:

Europäische Lawinengefahrenskala mit Empfehlungen
 

Snow maps

 
 
866388664686642866378663586636866478665186645866398664186657866408665386653866508665686654866488665286658866728666086667866698666886670866748667986675866788668086688866818668386686866878669986692866918669186694866978669586698866968670286702867018670586716867138671486718867178672086722867238672386723867238672186719
 
 
 

Further information

Print versions of avalanche bulletin

Print-suitable avalanche bulletins, e.g. for a notice board.

 

Measured values

A bevy of data retrievable any time, filtered by station altitude.

Weekly report

An expert analysis of previous week’s avalanche situation.

Submit observation

Your observations can improve avalanche bulletin quality. Reports and photos gratefully accepted.

Destructive avalanches and avalanche accidents

Recent and older avalanche accidents incl. statistical analysis.

White Risk

The SLF free avalanche app. Avalanche bulletin, snow information and more for mobile devices.