Avalanche forecast for Nord-Troms Sunday 2019-02-24

3
Considerable
Published:

General unstable conditions. Wet avalanches can occur in the lowlands. In the mountains where precipitation falls as snow, avoid new and fresh stormslabs.

Wet snow (slab avalanches)

Water pooling in/above snow layers

Avoid avalanche release and run out areas. Wet snow avalanches tend to release spontaneously. Stability decreases when the snow surface gets wet and soft. Timing is important.
3 - Large
Spontaneous release
Specific steep slopes
Possible

Wet snow (slab avalanches)

Buried weak layer of faceted snow above a crust

Avoid avalanche release and run out areas. Wet snow avalanches tend to release spontaneously. Stability decreases when the snow surface gets wet and soft. Timing is important.
4 - Very large
Spontaneous release
Isolated steep slopes
Possible

Wind drifted snow (slab avalanches)

Poor bonding between layers in wind deposited snow

Avoid steep (more than 30 degrees) areas 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.
2 - Medium
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

20 mm precipitation, up to 30 mm in the most exposed areas.
Moderate gale from southwest., change to gale from the west during the afternoon.
-1 °C to 3 °C at 1100 m a.s.l.
Plus degrees up to 1100 m a.s.l.
Cloudy.

For updated info, please visit yr.no
14 mm precipitation.
Moderate gale from southwest., change to fresh breeze from the west during the evening.
-5 °C to 2 °C at 1100 m a.s.l.
Plus degrees up to 1000 m a.s.l. sunday night.
Cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Nord-Troms / KVÆNANGEN

Snow

24.02.2019 kl. 10:51

7 masl

Bjørnulf@ObsKorps (****)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  Bjørnulf@ObsKorps Comment:  Koppartindgryta

Avalanche Activity

23. Feb. During the day (+01:00) Wet slab avalanche One (1). 3 - Large. Spontaneous release Ett str 3 stort skred i Koppartindgryta, bruddkant 50+ cm, bredde 300 m. Også noen små våte skred fra berg, ett ned på veikanten ved Låvanveien.

Snow Cover

No snowdrift Wet

ObsID: 182778

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

Snow

24.02.2019 kl. 10:35

masl

drift@svv (**)

Weather

Rain 6 °C Arnøya (0moh) kl 09:00 0 cm nysnø akkumulert siste døgn.

Avalanche Activity

24. Feb 10:39 (+01:00) - 23. Feb 10:39 (+01:00) Dry slab avalanche 2 - Medium. Spontaneous release NW. Between 500 masl and 400 masl Gjelder Fv347 Lauksundskaret - Arnøyhamn,

Danger Sign

Much water in the snow regn på snø

ObsID: 182765

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

Snow

23.02.2019 kl. 09:18

masl

drift@svv (**)

Weather

Rain 5 °C Arnøya (0moh) kl 08:00 4 cm nysnø akkumulert siste døgn.

Danger Sign

Quick temperature change

ObsID: 182614

Nord-Troms / KÅFJORD

Snow

22.02.2019 kl. 13:57

71 masl

jan arild@obskorps (*****)

Weather

Rain 5 °C Da slo det om. 5 + og regn

ObsID: 182536

Nord-Troms / KÅFJORD

Snow

22.02.2019 kl. 11:58

656 masl

jan arild@obskorps (*****)

Image Of Snow Profile
Image 1 of 2 Of:  Snow Profile Copyright:  jan arild@obskorps Comment:  Nv vendt konveks brattheng 720 moh. God stabilitet
Image Of Snow Profile
Image 2 of 2 Of:  Snow Profile Copyright:  jan arild@obskorps

Avalanche Danger Assessment

3 Considerable Fokksnøflak virket å ha stabilisert seg raskt, og vedvarende svake lag av kantkorn ligger godt beskyttet i snødekket. FG 2 men det forventes st væromslag vil øke skredfaren betydelig når snødekket blir gjennomvåt av regn og mildvær Meldt vær vil gi stor skredfare. Det et sannsynlig med naturlig utløste skred, både løssnø- og våte flakskred. Skredproblem både opphoping av vann i snødekket og svekkelse av kantkornlag Vurdering av snødekket må sees som høyst forbigående da væromslag kom etter obskur med nedbør og mildere temperaturer

Avalanche Problems

Dry slab avalanche Buried weak layer of new snow Within half a meter The weak layer collapses easily and clean (easy propagation). The overlying slab is soft. Easy to trigger 2 - Medium N, NE, NW above 300 masl Skredproblem i dagens varsel ikke observert på tur, men forventes å være riktig når mildvær skår inn i regionen

Weather

Snow -1 °C 100% clouds Lett snø med vind fra S/SV. 1 + Og sludd/regn ved vei.

Avalanche Activity

22. Feb. During the day (+01:00) No avalanche activity

Snow Cover

130 cm in total Storm slab (soft slab) Snø ligg ujevnt fordelt i terreng. Pålagret myke fokksnøflak i leområder for siste døgnet med vind. Sprekker rundt for men lite spenninger i snødekket. Dårlig sikt

Danger Sign

No signs observed

ObsID: 182497

Nord-Troms / KÅFJORD

Snow

22.02.2019 kl. 10:32

421 masl

jan arild@obskorps (*****)

Image Of Snow Profile
Image 1 of 2 Of:  Snow Profile Copyright:  jan arild@obskorps Comment:  Vestvendt heng. Tregrensen . Tot snødybde 120 cm.
Image Of Snow Profile
Image 2 of 2 Of:  Snow Profile Copyright:  jan arild@obskorps Comment:  Ectn8@20q2
ObsID: 182467

Nord-Troms / KÅFJORD

Snow

22.02.2019 kl. 09:58

231 masl

jan arild@obskorps (*****)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  jan arild@obskorps

Snow Cover

120 cm in total Much loose snow (10-30cm) 15 cm løssnø i skog. Skarelag ca 30 cm ned i snødekket. over dette laget med tynt lag løssnø og 4F bundet snø.

ObsID: 182449

Nord-Troms / KÅFJORD

Snow

22.02.2019 kl. 09:10

14 masl

jan arild@obskorps (*****)

Weather

No precipitation from SW ↗ -5 grader og vindstille lengre inn Kåfjord. Mer vind og -1 i Djupvik. Fyker godt over toppene i høyden

ObsID: 182439

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

Snow

22.02.2019 kl. 08:05

masl

drift@svv (**)

Weather

No precipitation -1 °C Arnøya (0moh) kl 06:00 0 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

Danger Sign

Recent snowdrift

ObsID: 182434

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

Snow

21.02.2019 kl. 06:51

27 masl

drift@svv (**)

Weather

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

Danger Sign

Recent snowdrift

ObsID: 182241

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.