Avalanche forecast for Sør-Troms Thursday 2018-01-18

2
Moderate
Published:

Be careful in lee areas with wind deposited snow, typically behind ridges, ribs and in gullies. A weak layer of buried surface hoar can be present underneath fresh wind deposited snow in isolated features.

Wind slab avalanches

Poor bonding between layers in wind deposited snow

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.
Slab avalanche
2 - Small
High additional load
Some steep slopes
Possible

Persistent slab avalanches

Buried weak layer of surface hoar

Keep distance to each other and to release areas. 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, cracking and recent avalanches. However, absence of signs does not mean it is safe.
Slab avalanche
3 - Medium
High additional load
Isolated steep slopes
Possible

What are avalanche problems?

Rainfall
0 mm
Wind
Moderate gale from southeast, change to strong breeze from the southeast during the afternoon
Temperature
-11 °C til -6 °C på 1100 moh
Freezing level
Up to 100 masl to during renoon
Cloud cover
Partly cloudy

For updated info, please visit yr.no
Rainfall
0 mm
Wind
Strong breeze from southeast
Temperature
-16 °C til -10 °C på 1100 moh
Cloud cover
Partly cloudy

For updated info, please visit yr.no

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.

Visit www.ut.no for topographic maps online. For slope angle maps, see NGI slope angel maps ("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.