Navigation mit Access Keys

SLF HomeAvalanche bulletin and snow situation

Main menu

 
 

Avalanche bulletin through Friday, 23 April 2021

In the early morning a generally favourable avalanche situation will prevail. Wet avalanches as the day progresses

Edition: Th. 22.04., 17:00 Next update: Fr. 23.04., 17:00 Validity

Avalanche bulletin through Friday, 23 April 2021

In the early morning a generally favourable avalanche situation will prevail. Wet avalanches as the day progresses

Edition Th. 22.04., 17:00 Next update Fr. 23.04., 18:00 Validity

Avalanche bulletin through Friday, 23 April 2021

In the early morning a generally favourable avalanche situation will prevail. Wet avalanches as the day progresses

Edition Th. 22.04., 17:00 Next update Fr. 23.04., 17:00 Validity

Avalanche bulletin through Friday, 23 April 2021

In the early morning a generally favourable avalanche situation will prevail. Wet avalanches as the day progresses

Edition Th. 22.04., 17:00 Next update Fr. 23.04., 17:00 Validity

  
Level 2, moderate

Dry avalanches: No distinct avalanche problem

Avalanche prone locations
In particular in west to north to east facing aspects above approximately 2200m.

In particular in west to north to east facing aspects above approximately 2200m.

Danger description

Isolated avalanche prone weak layers exist in the top section of the snowpack. Dry avalanches can reach medium size. The avalanche prone locations are difficult to recognise, caution is to be exercised in particular in areas where the snow cover is rather shallow.
The new snow of Wednesday is in some cases still prone to triggering. Restraint should be exercised because avalanches can sweep people along and give rise to falls.

Wet avalanches as day progresses

Danger map Wet

see also snowpack and weather

Level 2, moderate

Dry avalanches: No distinct avalanche problem

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

Isolated avalanche prone weak layers exist in the top section of the snowpack. Dry avalanches can reach medium size. The avalanche prone locations are difficult to recognise, caution is to be exercised in particular in areas where the snow cover is rather shallow. 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.

Wet avalanches as day progresses

Danger map Wet

see also snowpack and weather

Level 1, low

Dry avalanches: No distinct avalanche problem

In the early morning a favourable avalanche situation will prevail. Individual avalanche prone locations are to be found in particular in extremely steep terrain. Extremely slopes are to be traversed by snow sport participants one at a time. 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.

Wet avalanches as day progresses

Danger map Wet

see also snowpack and weather

Level 1, low

Wet avalanches as day progresses

Only a little snow is lying. As a consequence of warming during the day and solar radiation gliding avalanches and moist snow slides are possible. This applies especially on north facing slopes.

Dry avalanches

Danger map Dry

see also snowpack and weather

Level 2, moderate

Wet avalanches as day progresses

On very steep sunny slopes more frequent small and medium-sized wet avalanches are to be expected. Backcountry tours should be concluded timely.
On grassy slopes individual gliding avalanches are to be expected below approximately 2400 m. These can in isolated cases reach large size.

Dry avalanches

Danger map Dry

see also snowpack and weather

In the early morning a generally favourable avalanche situation will prevail. Wet avalanches as the day progresses
Edition: 22.4.2021, 17:00 / Next update: 23.4.2021, 18:00
Snowpack
In isolated cases dry-snow avalanches can be triggered in the near-surface layers of the snow cover. Generally these releases sweep away the most recent layers of fresh snow and freshly generated snowdrift accumulations from the previous week. As a result of generally light winds, small ridgeline snowdrifts have been generated afresh in the last few days in those regions where there was fresh snow.
Following the night of predominantly clear skies on Thursday night, the avalanche situation will be predominantly favourable on Friday morning. During the course of the day, the danger of wet-snow avalanches is expected to increase. Since Tuesday, gliding avalanches have once again been reported.
Observed weather on Thursday, 22.04.2021
Nighttime skies were partly overcast and there was a small amount of precipitation from place to place. During the daytime it was predominantly sunny in the western and the southern regions, with convective cloud build-up over the course of the day. In the eastern regions it was partly sunny with local showers in the eastern sector of the northern flank of the Alps and in Prättigau more than anywhere else. The snowfall level lay at 1400 to 1600 m.
Fresh snow
  • furthermost western part of Lower Valais, western sector of the northern flank of the Alps: 5 to 10 cm from place to place;
  • in the other regions of Switzerland, up to 5 cm from place to place.
Temperature
At midday at 2000 m, +2 °C in the western regions, +4 °C in the southern regions, and 0 °C in the eastern regions.
Wind
Winds were blowing at light strength from northeasterly directions.
Weather forecast through Friday, 23.04.2021
On Thursday night in the northeastern regions, skies will be partly overcast to begin with, elsewhere skies are expected to be mostly clear. During the daytime on Friday it will be predominantly sunny.
Fresh snow
-
Temperature
At midday at 2000 m, between +4 °C in the western regions and +2 °C in the eastern regions.
Wind
Winds will be light to moderate in strength, blowing from northerly to northeasterly directions.
Outlook through Sunday, 25.04.2021
Nocturnal skies are expected to be generally clear, with adequate outgoing longwave radiation. On Saturday it will be sunny, in the southern regions intermittent high-altitude cloudbanks are anticipated. On Sunday it will be sunny by and large, in southern regions the high-altitude cloudbanks will increase during the course of the day. The zero-degree level will lie at 2600 m at midday each day. Winds will be blowing at light-to-moderate strength from northwesterly directions.
The danger of dry-snow avalanches is expected to diminish. During the course of the day, wet-snow and gliding avalanches can be expected. Tours in outlying terrain should be launched early in the day and brought to a close early in the day.
 

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 early morning a generally favourable avalanche situation will prevail. Wet avalanches as the day progresses
Edition: 22.4.2021, 17:00 / Next update: 23.4.2021, 18:00
Snowpack
In isolated cases dry-snow avalanches can be triggered in the near-surface layers of the snow cover. Generally these releases sweep away the most recent layers of fresh snow and freshly generated snowdrift accumulations from the previous week. As a result of generally light winds, small ridgeline snowdrifts have been generated afresh in the last few days in those regions where there was fresh snow.
Following the night of predominantly clear skies on Thursday night, the avalanche situation will be predominantly favourable on Friday morning. During the course of the day, the danger of wet-snow avalanches is expected to increase. Since Tuesday, gliding avalanches have once again been reported.
Observed weather on Thursday, 22.04.2021
Nighttime skies were partly overcast and there was a small amount of precipitation from place to place. During the daytime it was predominantly sunny in the western and the southern regions, with convective cloud build-up over the course of the day. In the eastern regions it was partly sunny with local showers in the eastern sector of the northern flank of the Alps and in Prättigau more than anywhere else. The snowfall level lay at 1400 to 1600 m.
Fresh snow
  • furthermost western part of Lower Valais, western sector of the northern flank of the Alps: 5 to 10 cm from place to place;
  • in the other regions of Switzerland, up to 5 cm from place to place.
Temperature
At midday at 2000 m, +2 °C in the western regions, +4 °C in the southern regions, and 0 °C in the eastern regions.
Wind
Winds were blowing at light strength from northeasterly directions.
Weather forecast through Friday, 23.04.2021
On Thursday night in the northeastern regions, skies will be partly overcast to begin with, elsewhere skies are expected to be mostly clear. During the daytime on Friday it will be predominantly sunny.
Fresh snow
-
Temperature
At midday at 2000 m, between +4 °C in the western regions and +2 °C in the eastern regions.
Wind
Winds will be light to moderate in strength, blowing from northerly to northeasterly directions.
Outlook through Sunday, 25.04.2021
Nocturnal skies are expected to be generally clear, with adequate outgoing longwave radiation. On Saturday it will be sunny, in the southern regions intermittent high-altitude cloudbanks are anticipated. On Sunday it will be sunny by and large, in southern regions the high-altitude cloudbanks will increase during the course of the day. The zero-degree level will lie at 2600 m at midday each day. Winds will be blowing at light-to-moderate strength from northwesterly directions.
The danger of dry-snow avalanches is expected to diminish. During the course of the day, wet-snow and gliding avalanches can be expected. Tours in outlying terrain should be launched early in the day and brought to a close early in the day.

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;
    This SMS service will be discontinued on 31.12.2020. Please use the SLF free mobile app "White Risk".
  • 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
 

Social media

Further information on the avalanche bulletin and avalanche danger, interesting facts about WhiteRisk and much more at @whiteriskslf:

  

Snow maps

 
 
885798857788576885758857488567885638855888549885468854188544
 
 
 

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.