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Avalanche bulletin through Tuesday, 4 August 2020

Marked increase in avalanche danger on northern Alpine Ridge

Edition: Mo. 03.08., 17:00 Next update: In the event of heavy snowfall Validity

Avalanche bulletin through Tuesday, 4 August 2020

Marked increase in avalanche danger on northern Alpine Ridge

Edition Mo. 03.08., 17:00 Next update In the event of heavy snowfall Validity

Avalanche bulletin through Tuesday, 4 August 2020

Marked increase in avalanche danger on northern Alpine Ridge

Edition Mo. 03.08., 17:00 Next update In the event of heavy snowfall Validity

Avalanche bulletin through Tuesday, 4 August 2020

Marked increase in avalanche danger on northern Alpine Ridge

Edition Mo. 03.08., 17:00 Next update In the event of heavy snowfall Validity

 
Marked increase in avalanche danger on northern Alpine Ridge
Edition: 3.8.2020, 17:00 / Next update: In the event of heavy snowfall
Avalanche danger
Dry-snow avalanches
The avalanche prone locations for dry-snow avalanches are found in high alpine regions more than anywhere else.
On the northern Alpine Ridge from the Wildstrubel as far as Tödi, naturally triggered avalanches are to be expected, in isolated cases also large-sized releases, particularly during Monday night. As the period of precipitation comes to an end, the activity of naturally triggered avalanches will also terminate during the course of the day. However, avalanches can still be triggered by persons and, in isolated cases, grow to large size.
In the remaining parts of the high alpine regions the danger stems from freshly generated snowdrift accumulations more than anything else. Dry-snow avalanches can be triggered by mountain climbers and reach medium size.
Wet-snow avalanches
At high altitudes the fresh-fallen snow will be deposited on warm ground. On very steep rocky and grassy slopes, wet-snow and gliding avalanches can be expected. These releases can grow to medium size, particularly in the major areas of precipitation.
Snow and weather
Snowpack
As a result of the large amounts of fresh snow and strong-velocity winds, deep snowdrift accumulations will form in the high alpine regions.
Prior to this round of precipitation there was still old snow on the ground in the high alpine regions, particularly on the glaciers and on very steep north-facing slopes. The snowpack surface was generally rough-hewn and thus, provided a favourable base for the current snowfall.
Weather review for Monday, 3 August
During the morning in the furthermost southern regions there were still bright intervals evident, elsewhere skies were overcast, accompanied by showers. During the course of the day, the precipitation became increasingly intensive in the western and southern regions in particular. The snowfall level lay at approximately 3000 m.
Weather outlook through Tuesday, 4 August
During Monday night, intensive precipitation is anticipated over widespread areas. During the course of the day on Tuesday, individual bright intervals will set in from the west. In the eastern regions the precipitation is expected to last until Tuesday evening. The snowfall level will descend to approximately 2400 m on Monday evening. Winds will be blowing at strong velocity at high altitudes, to some extent at storm strength in the southern regions, from northerly to northeasterly directions.

By Tuesday afternoon, the following amounts of precipitation are anticipated:
  • northern Alpine Ridge from the Wildstrubel into Liechtenstein: 50 to 80 mm;
  • remaining parts of Grisons: 30 to 50 mm;
  • remaining parts of the Valais not including the Simplon region: 20 to 40 mm; in the other regions of Switzerland, less.
Above 3400 m, the millimetre measurements of precipitation can be calculated as centimetres of fresh fallen snow. At 3000 m, approximately half that amount of snow can be expected.
Outlook
On Tuesday night, the precipitation will come to an end in the eastern regions as well. Subsequently, it will become quite sunny and warm. The zero-degree level is expected to ascend to approximately 4000 m on Wednesday. Also on Thursday and Friday it is expected to be quite sunny, accompanied by convective cloud build-up and isolated thunderstorms in the evening hours, and temperatures will rise increasingly.
The danger of dry-snow avalanches will decrease. Nonetheless, mountain climbers can still trigger dry-snow avalanches in some places. Special caution is urged particularly on extremely steep north-facing slopes in high alpine regions.
As a result of solar radiation and the warmth, numerous wet-snow avalanches can be expected to trigger from the fresh fallen snow. These releases can grow to large size in isolated cases in the major areas of precipitation. Starting on Thursday, the danger of wet-snow avalanches will decrease.

Keep informed about the publication of unannounced Avalanche Bulletins. Activate in the App WhiteRisk the "Push Summer Bulletin". You can also subscribe to the SMS Service by sending an SMS "START SLF SOMMER" to Nr. 9234 (only Swiss cell phone providers) or unsubscribe by sending an SMS "STOP SLF SOMMER" (CHF 0.2/SMS).
Marked increase in avalanche danger on northern Alpine Ridge
Edition: 3.8.2020, 17:00 / Next update: In the event of heavy snowfall
Avalanche danger
Dry-snow avalanches
The avalanche prone locations for dry-snow avalanches are found in high alpine regions more than anywhere else.
On the northern Alpine Ridge from the Wildstrubel as far as Tödi, naturally triggered avalanches are to be expected, in isolated cases also large-sized releases, particularly during Monday night. As the period of precipitation comes to an end, the activity of naturally triggered avalanches will also terminate during the course of the day. However, avalanches can still be triggered by persons and, in isolated cases, grow to large size.
In the remaining parts of the high alpine regions the danger stems from freshly generated snowdrift accumulations more than anything else. Dry-snow avalanches can be triggered by mountain climbers and reach medium size.
Wet-snow avalanches
At high altitudes the fresh-fallen snow will be deposited on warm ground. On very steep rocky and grassy slopes, wet-snow and gliding avalanches can be expected. These releases can grow to medium size, particularly in the major areas of precipitation.
Snow and weather
Snowpack
As a result of the large amounts of fresh snow and strong-velocity winds, deep snowdrift accumulations will form in the high alpine regions.
Prior to this round of precipitation there was still old snow on the ground in the high alpine regions, particularly on the glaciers and on very steep north-facing slopes. The snowpack surface was generally rough-hewn and thus, provided a favourable base for the current snowfall.
Weather review for Monday, 3 August
During the morning in the furthermost southern regions there were still bright intervals evident, elsewhere skies were overcast, accompanied by showers. During the course of the day, the precipitation became increasingly intensive in the western and southern regions in particular. The snowfall level lay at approximately 3000 m.
Weather outlook through Tuesday, 4 August
During Monday night, intensive precipitation is anticipated over widespread areas. During the course of the day on Tuesday, individual bright intervals will set in from the west. In the eastern regions the precipitation is expected to last until Tuesday evening. The snowfall level will descend to approximately 2400 m on Monday evening. Winds will be blowing at strong velocity at high altitudes, to some extent at storm strength in the southern regions, from northerly to northeasterly directions.

By Tuesday afternoon, the following amounts of precipitation are anticipated:
  • northern Alpine Ridge from the Wildstrubel into Liechtenstein: 50 to 80 mm;
  • remaining parts of Grisons: 30 to 50 mm;
  • remaining parts of the Valais not including the Simplon region: 20 to 40 mm; in the other regions of Switzerland, less.
Above 3400 m, the millimetre measurements of precipitation can be calculated as centimetres of fresh fallen snow. At 3000 m, approximately half that amount of snow can be expected.
Outlook
On Tuesday night, the precipitation will come to an end in the eastern regions as well. Subsequently, it will become quite sunny and warm. The zero-degree level is expected to ascend to approximately 4000 m on Wednesday. Also on Thursday and Friday it is expected to be quite sunny, accompanied by convective cloud build-up and isolated thunderstorms in the evening hours, and temperatures will rise increasingly.
The danger of dry-snow avalanches will decrease. Nonetheless, mountain climbers can still trigger dry-snow avalanches in some places. Special caution is urged particularly on extremely steep north-facing slopes in high alpine regions.
As a result of solar radiation and the warmth, numerous wet-snow avalanches can be expected to trigger from the fresh fallen snow. These releases can grow to large size in isolated cases in the major areas of precipitation. Starting on Thursday, the danger of wet-snow avalanches will decrease.

Keep informed about the publication of unannounced Avalanche Bulletins. Activate in the App WhiteRisk the "Push Summer Bulletin". You can also subscribe to the SMS Service by sending an SMS "START SLF SOMMER" to Nr. 9234 (only Swiss cell phone providers) or unsubscribe by sending an SMS "STOP SLF SOMMER" (CHF 0.2/SMS).
 

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:

Marked increase in avalanche danger on northern Alpine Ridge
Edition: 3.8.2020, 17:00 / Next update: In the event of heavy snowfall
Avalanche danger
Dry-snow avalanches
The avalanche prone locations for dry-snow avalanches are found in high alpine regions more than anywhere else.
On the northern Alpine Ridge from the Wildstrubel as far as Tödi, naturally triggered avalanches are to be expected, in isolated cases also large-sized releases, particularly during Monday night. As the period of precipitation comes to an end, the activity of naturally triggered avalanches will also terminate during the course of the day. However, avalanches can still be triggered by persons and, in isolated cases, grow to large size.
In the remaining parts of the high alpine regions the danger stems from freshly generated snowdrift accumulations more than anything else. Dry-snow avalanches can be triggered by mountain climbers and reach medium size.
Wet-snow avalanches
At high altitudes the fresh-fallen snow will be deposited on warm ground. On very steep rocky and grassy slopes, wet-snow and gliding avalanches can be expected. These releases can grow to medium size, particularly in the major areas of precipitation.
Snow and weather
Snowpack
As a result of the large amounts of fresh snow and strong-velocity winds, deep snowdrift accumulations will form in the high alpine regions.
Prior to this round of precipitation there was still old snow on the ground in the high alpine regions, particularly on the glaciers and on very steep north-facing slopes. The snowpack surface was generally rough-hewn and thus, provided a favourable base for the current snowfall.
Weather review for Monday, 3 August
During the morning in the furthermost southern regions there were still bright intervals evident, elsewhere skies were overcast, accompanied by showers. During the course of the day, the precipitation became increasingly intensive in the western and southern regions in particular. The snowfall level lay at approximately 3000 m.
Weather outlook through Tuesday, 4 August
During Monday night, intensive precipitation is anticipated over widespread areas. During the course of the day on Tuesday, individual bright intervals will set in from the west. In the eastern regions the precipitation is expected to last until Tuesday evening. The snowfall level will descend to approximately 2400 m on Monday evening. Winds will be blowing at strong velocity at high altitudes, to some extent at storm strength in the southern regions, from northerly to northeasterly directions.

By Tuesday afternoon, the following amounts of precipitation are anticipated:
  • northern Alpine Ridge from the Wildstrubel into Liechtenstein: 50 to 80 mm;
  • remaining parts of Grisons: 30 to 50 mm;
  • remaining parts of the Valais not including the Simplon region: 20 to 40 mm; in the other regions of Switzerland, less.
Above 3400 m, the millimetre measurements of precipitation can be calculated as centimetres of fresh fallen snow. At 3000 m, approximately half that amount of snow can be expected.
Outlook
On Tuesday night, the precipitation will come to an end in the eastern regions as well. Subsequently, it will become quite sunny and warm. The zero-degree level is expected to ascend to approximately 4000 m on Wednesday. Also on Thursday and Friday it is expected to be quite sunny, accompanied by convective cloud build-up and isolated thunderstorms in the evening hours, and temperatures will rise increasingly.
The danger of dry-snow avalanches will decrease. Nonetheless, mountain climbers can still trigger dry-snow avalanches in some places. Special caution is urged particularly on extremely steep north-facing slopes in high alpine regions.
As a result of solar radiation and the warmth, numerous wet-snow avalanches can be expected to trigger from the fresh fallen snow. These releases can grow to large size in isolated cases in the major areas of precipitation. Starting on Thursday, the danger of wet-snow avalanches will decrease.

Keep informed about the publication of unannounced Avalanche Bulletins. Activate in the App WhiteRisk the "Push Summer Bulletin". You can also subscribe to the SMS Service by sending an SMS "START SLF SOMMER" to Nr. 9234 (only Swiss cell phone providers) or unsubscribe by sending an SMS "STOP SLF SOMMER" (CHF 0.2/SMS).

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:

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Print versions of avalanche bulletin

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Measured values

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

Weekly report

An expert analysis of previous week’s avalanche situation.

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Destructive avalanches and avalanche accidents

Recent and older avalanche accidents incl. statistical analysis.

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