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Avalanche bulletin for Sunday, 17 February 2019

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

Edition: Su. 17.02., 08:00 Next update: Su. 17.02., 17:00 Validity

Avalanche bulletin for Sunday, 17 February 2019

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

Edition Sa. 16.02., 17:00 Next update Su. 17.02., 18:00 Validity

Avalanche bulletin for Sunday, 17 February 2019

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

Edition Su. 17.02., 08:00 Next update Su. 17.02., 17:00 Validity

Avalanche bulletin for Sunday, 17 February 2019

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

Edition Su. 17.02., 08:00 Next update Su. 17.02., 17:00 Validity

 
Level 1, low

Dry avalanches:

Individual avalanche prone locations are to be found in particular on extremely steep shady slopes above approximately 2000 m. Even a snow slide can sweep snow sport participants along and give rise to falls.

Gliding avalanches

Danger map Gliding

see also snowpack and weather

Level 2, moderate

Dry avalanches:

Avalanche prone locations
In particular in northwest to north to northeast facing aspects above approximately 2200m.

In particular in northwest to north to northeast facing aspects above approximately 2200m.

Danger description

The older wind slabs can still in isolated cases be released. They are to be evaluated with care and prudence especially in very steep terrain. The avalanche prone locations are to be found in particular at transitions from a shallow to a deep snowpack, when entering gullies and bowls for example.
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

Danger map Gliding

see also snowpack and weather

Level 2, moderate

Dry avalanches:

Avalanche prone locations
In particular in northwest to north to northeast facing aspects above approximately 2000m.

In particular in northwest to north to northeast facing aspects above approximately 2000m.

Danger description

Faceted weak layers exist in the snowpack. In isolated cases avalanches can be released in the old snowpack and reach medium size. The avalanche prone locations are to be found in particular on little-used, rather lightly snow-covered slopes and in areas close to the tree line.
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

Danger map Gliding

see also snowpack and weather

Level 1, low

Dry avalanches:

On extremely steep shady slopes only isolated dry avalanches are possible. Restraint should be exercised because avalanches can sweep people along and give rise to falls.

Gliding avalanches

Danger map Gliding

see also snowpack and weather

Level 1, low

Dry avalanches:

Individual avalanche prone locations are to be found in particular on extremely steep shady slopes above approximately 1600 m. Even a snow slide can sweep snow sport participants along and give rise to falls.

Gliding avalanches

Danger map Gliding

see also snowpack and weather

Level 2, moderate

Dry avalanches:

Avalanche prone locations
In particular in northwest to north to northeast facing aspects above approximately 1800m.

In particular in northwest to north to northeast facing aspects above approximately 1800m.

Danger description

Faceted weak layers exist in the snowpack. In isolated cases avalanches can be released in the old snowpack and reach medium size. The avalanche prone locations are to be found in particular on little-used, rather lightly snow-covered slopes and in areas close to the tree line.
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

Danger map Gliding

see also snowpack and weather

Level 2, moderate

Gliding avalanches

Avalanche prone locations
In particular in east to south to west facing aspects above approximately 2500m.

In particular in east to south to west facing aspects above approximately 2500m.

Danger description

As a consequence of warming during the day and solar radiation mostly small wet and gliding avalanches are to be expected. Caution is to be exercised in areas with glide cracks.

Dry avalanches

Danger map Dry

see also snowpack and weather

Level 3, considerable

Gliding avalanches

Avalanche prone locations
In particular in east to south to west facing aspects above approximately 2500m.

In particular in east to south to west facing aspects above approximately 2500m.

Danger description

As a consequence of warming during the day and solar radiation numerous gliding avalanches are to be expected, even large ones. This applies in particular on very steep sunny slopes below approximately 2500 m. Individual gliding avalanches can also be released in the night or in the morning. Exposed transportation routes can be endangered. Caution is to be exercised in areas with glide cracks.
In addition as the day progresses on west, south and east facing slopes, individual mostly small wet avalanches are possible.

Dry avalanches

Danger map Dry

see also snowpack and weather

Level 1, low

Gliding avalanches

As a consequence of warming during the day and solar radiation mostly small wet and gliding avalanches are possible. Caution is to be exercised in areas with glide cracks.

Dry avalanches

Danger map Dry

see also snowpack and weather

In the early morning a generally favourable avalanche situation will prevail. Gliding avalanches as the day progresses
Edition: 16.2.2019, 17:00 / Next update: 17.2.2019, 18:00
Snowpack
In the middle section of the snow cover on the northern flank of the Alps more than anywhere else, but also in some places of the Valais and in Grisons, there are weak layers consisting of expansively metamorphosed (faceted) snow crystals evident. These layers are prone to triggering in isolated cases in places on shady slopes where the snow is relatively shallow and in the vicinity of the timberline.
In addition, as a consequence of the daytime warming and solar radiation cycle, wet-snow and glide-snow avalanches can be expected on very steep, sunny slopes below approximately 2500 m. In isolated cases, glide-snow avalanches are also possible during the nocturnal hours. In the regions of the north and the east where recent snowfall has been heaviest, more than anywhere else, these releases can grow to large size.
On steep north-facing slopes, the surface of the snowpack is frequently still powdery above approximately 1000 m. On very steep, south-facing slopes below approximately 2500 m, a crust capable of bearing loads tends to form during nights when the skies are clear; on east and west-facing slopes, a breakable crust is formed.
Observed weather on Saturday, 16.02.2019
Following a night of clear skies, it was sunny.
Fresh snow
-
Temperature
At midday at 2000 m, +7 °C.
Wind
Winds during the morning hourse were blowing from westerly to southwesterly directions at moderate strength at high altitudes in particular; in the other regions of Switzerland, winds were predominantly light.
Weather forecast through Sunday, 17.02.2019
Nocturnal skies are expected to be clear for the most part; it will be sunny during the daytime.
Fresh snow
-
Temperature
At midday at 2000 m, +7 °C.
Wind
Intermittently moderate strength southwesterly winds at high altitudes on the northern flank of the Alps more than anywhere else; in the other regions of Switzerland, winds will be predominantly light.
Outlook through Tuesday, 19.02.2019
It will be sunny. Temperatures are expected to recede somewhat, particularly on Tuesday.
The danger of dry-snow avalanches is not expected to change significantly. The danger of wet-snow and glide-snow avalanches will increase on steep, sunny slopes below approximately 2500 m during the course of each day. Glide-snow avalanches are capable of expanding to large size.
 

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. Gliding avalanches as the day progresses
Edition: 16.2.2019, 17:00 / Next update: 17.2.2019, 18:00
Snowpack
In the middle section of the snow cover on the northern flank of the Alps more than anywhere else, but also in some places of the Valais and in Grisons, there are weak layers consisting of expansively metamorphosed (faceted) snow crystals evident. These layers are prone to triggering in isolated cases in places on shady slopes where the snow is relatively shallow and in the vicinity of the timberline.
In addition, as a consequence of the daytime warming and solar radiation cycle, wet-snow and glide-snow avalanches can be expected on very steep, sunny slopes below approximately 2500 m. In isolated cases, glide-snow avalanches are also possible during the nocturnal hours. In the regions of the north and the east where recent snowfall has been heaviest, more than anywhere else, these releases can grow to large size.
On steep north-facing slopes, the surface of the snowpack is frequently still powdery above approximately 1000 m. On very steep, south-facing slopes below approximately 2500 m, a crust capable of bearing loads tends to form during nights when the skies are clear; on east and west-facing slopes, a breakable crust is formed.
Observed weather on Saturday, 16.02.2019
Following a night of clear skies, it was sunny.
Fresh snow
-
Temperature
At midday at 2000 m, +7 °C.
Wind
Winds during the morning hourse were blowing from westerly to southwesterly directions at moderate strength at high altitudes in particular; in the other regions of Switzerland, winds were predominantly light.
Weather forecast through Sunday, 17.02.2019
Nocturnal skies are expected to be clear for the most part; it will be sunny during the daytime.
Fresh snow
-
Temperature
At midday at 2000 m, +7 °C.
Wind
Intermittently moderate strength southwesterly winds at high altitudes on the northern flank of the Alps more than anywhere else; in the other regions of Switzerland, winds will be predominantly light.
Outlook through Tuesday, 19.02.2019
It will be sunny. Temperatures are expected to recede somewhat, particularly on Tuesday.
The danger of dry-snow avalanches is not expected to change significantly. The danger of wet-snow and glide-snow avalanches will increase on steep, sunny slopes below approximately 2500 m during the course of each day. Glide-snow avalanches are capable of expanding to large size.

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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