Avalanche forecast for Nord-Troms Thursday 2019-02-21

Highest danger level per day:
2
Moderate
Published:

Be careful in areas with windslabs. A persistent weak layer of facets may be triggered, especially where the snow cover is thin.

Illustrasjon av ferdselsråd Be careful and keep distance to each other in steep (above 30 degrees) terrain with fresh wind deposited snow, especially convex terrain. An avalanche is easier to trigger where wind slabs are thin or soft. Look for areas where the wind recently has deposited snow, typically behind ridges, ribs and in gullies. Remember that local wind effects will cause variation in where the wind slabs occur.
Illustrasjon av ferdselsråd Keep distance to each other when traveling in avelanche terrain. NB, remote triggering is possible. Make very conservative route choices, especially in unknown terrain, after snowfall and if temperatures rise. Identifying areas where the weak layer is present might be difficult and requires experience. Danger signs are whoumpf-sounds and cracking which means that you influence weak layers and should avoid avalanche terrain. However, absence of signs does not mean it is safe.

Wind drifted snow (slab avalanches)

Poor bonding between layers in wind deposited snow

Read more about the avalanche problem
2 - Medium
Low additional load
Specific steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow above a crust

Read more about the avalanche problem
2 - Medium
High additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

3 mm precipitation.
Fresh breeze from north., change to breeze from the west during the afternoon.
-18 °C to -12 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
0 mm precipitation.
Breeze from southwest., change to fresh breeze from the west during the afternoon.
-17 °C to -8 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Nord-Troms / D1907(55340) Nord Troms 2017-2022

Snow

21.02.2019 kl. 06:51

27 masl

drift@svv (**)

Danger Sign

Recent snowdrift

Weather

Snow -8 °C Arnøya (0moh) kl 06:00 20 cm nysnø akkumulert siste døgn. Snøfokk siste 12 timer.

ObsID: 182241

Nord-Troms / D1907(55340) Nord Troms 2017-2022

Snow

20.02.2019 kl. 06:43

83 masl

drift@svv (**)

Danger Sign

Recent snowdrift

Weather

Snow -5 °C Arnøya (0moh) kl 06:00 15 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

ObsID: 182028

Nord-Troms / D1907(55340) Nord Troms 2017-2022

Snow

19.02.2019 kl. 07:19

10 masl

drift@svv (**)

Danger Sign

Recent snowdrift

Weather

Snow -6 °C Arnøya (0moh) kl 06:00 10 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

ObsID: 181862

Nord-Troms / D1907(55340) Nord Troms 2017-2022

Snow

18.02.2019 kl. 06:52

0 masl

drift@svv (**)

Danger Sign

Recent snowdrift

Weather

Snow -3 °C Arnøya (0moh) kl 06:00 10 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

ObsID: 181652

The bulletin does not include a detailed text about the avalanche conditions. This is only given in Norwegian. Translate it using google translate if you like. The text result will be informative, and most likely amusing

For planning your trip and recognizing avalanche terrain, use maps.

Norway has 1:50 000 maps for the whole country. Maps can be bought at bookstores and sports shops, or printed from the net.

For slope angle maps, download the app Varsom Regobs on App Store | Google Play or see our slope angle map at senorge.no ("helning" means slope angle).

Modelled snowpack and historic and current weather information can be found on the webpage senorge.no. This site uses information from the weather stations and interpolate values from the stations for gridded maps.

Detailed weather forecast can be found online at www.yr.no or www.storm.no. Yr.no is also in English, but the weather in text format is only given in Norwegian.