Avalanche forecast for Nord-Troms Tuesday 2019-03-19

2
Moderate
Published:

Challenging conditions. A persistent weak layer is buried in the snowpack and can be affected by a skier. Avalanches are easiest to trigger aroud the treeline where overlaying snow are soft, and remote triggering is possible. Windslabs may still be unstable.

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow above a crust

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.
3 - Large
High additional load
Specific steep slopes
Possible

Wind drifted snow (slab avalanches)

Buried weak layer of new 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.
2 - Medium
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Fresh breeze from southeast.
-16 °C to -10 °C at 1100 m a.s.l.
Clear skies.

For updated info, please visit yr.no
0 mm precipitation.
Breeze from east., change to fresh breeze from the south during the evening.
-13 °C to -7 °C at 1100 m a.s.l.
Clear skies.

For updated info, please visit yr.no

Observations the last 3 days

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

Snow

19.03.2019 kl. 06:45

masl

drift@svv (**)

Weather

No precipitation -2 °C Arnøya (0moh) kl 06:00 0 cm nysnø akkumulert siste døgn.

Danger Sign

No signs observed

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 186986

Nord-Troms / Gamanjunni

Snow

18.03.2019 kl. 10:16

1092 masl

Ingrid@NVE (*****)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright: 

Danger Sign

Recent snowdrift Snøfokk på toppane. Vindstyrke 8 m/s, men i kast opp til 16 m/s. Vindretninga er SØ

ObsID: 186859

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

Snow

18.03.2019 kl. 07:56

27 masl

drift@svv (**)

Avalanche Activity

18. Mar 08:01 (+01:00) - 17. Mar 08:01 (+01:00) Dry slab avalanche 2 - Medium. Spontaneous release E. Between 600 masl and 500 masl Gjelder Fv348 Langfjordbotn - Akkarvik,

ObsID: 186835

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

Snow

18.03.2019 kl. 07:56

masl

drift@svv (**)

Weather

No precipitation -4 °C Arnøya (0moh) kl 06:00 0 cm nysnø akkumulert siste døgn. Snøfokk siste 12 timer.

Danger Sign

Recent snowdrift

ObsID: 186836

Nord-Troms / NORDREISA

Snow

17.03.2019 kl. 12:05

610 masl

StigR@obskorps (***)

Image Of Snow Cover
Image 1 of 2 Of:  Snow Cover Copyright:  StigR
Image Of Snow Profile
Image 2 of 2 Of:  Snow Profile Copyright: 

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow beneath a crust Within a meter 2 - Medium SW above 600 masl Tynt lag med kantkorn under skare/is. Funnet 2 islag. Kantkorn under nederste islag på 72 cm dybde.

Avalanche Danger Assessment

2 Moderate Vindtransportert snø over tynt islag. Flakskred er mulig. Forecast correct

Snow Cover

180 cm in total No snowdrift 2 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl Some loose snow (1-10cm) Dry

Weather

Snow -7 °C from NE ↙ 90% clouds

Danger Sign

No signs observed

Avalanche Activity

17. Mar. During the day (+01:00) No avalanche activity

Snow Profile

7 stratigraphy layers observed 1 temperature points observed Ikke tatt stabilitetstest da jeg manglet sag og skarelaget var høyt og hardt.

ObsID: 186727

Nord-Troms / KÅFJORD

Snow

17.03.2019 kl. 11:15

483 masl

jan arild@obskorps (*****)

Image Of Notes
Image 1 of 1 Of:  Notes Copyright:  jan arild@obskorps Comment:  Østvendt heng 450 moh. God stabilitet i snødekket. Fikk brudd med forplantning i tester under tregrensen

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow above a crust Within half a meter The weak layer collapses easily and clean (easy propagation). The overlying slab is soft. Difficult to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW between 600 masl and 100 masl

Avalanche Danger Assessment

2 Moderate Skredproblemet er knyttet til et vedvarende svakt lag av kantkorn over et gammelt skarelag, og er utbredt i skog og rundt tregrensen. Høyere i fjellet virker dette laget mindre utviklet og godt beskyttet. Det er fortsatt mulig å løse ut skred spesielt i bratt terreng hvor det er pålagret fokksnø, slik som over rygger og elvedaler. Men fokksnøflak virker å tåle større belastning Været tilsier ingen endringer i sredfaren

Snow Cover

80 cm in total No snowdrift 3 cm new snow Wind slab (hard slab) Dry Litt løssnø i skogen. Vindpakket hardt over tregrense. Gammel skare over rygger. Under tregrense sprekker fokksnøen opp rundt fot på et lag med kantkorn over gammel skare. Virker ikke å være mye spenninger i snødekket. Har gått enkelte små skred på dette kantkornlaget i bratte elvedaler, men virker nå mer stabil.

Weather

No precipitation -2 °C 60% clouds

Danger Sign

No signs observed

ObsID: 186723

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

Snow

17.03.2019 kl. 08:17

27 masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv348 Langfjordbotn - Akkarvik,

ObsID: 186646

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

Snow

17.03.2019 kl. 08:17

masl

drift@svv (**)

Weather

Snow -1 °C Arnøya (0moh) kl 07:00 20 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

Danger Sign

Recent snowdrift

ObsID: 186647

Nord-Troms / KÅFJORD

Snow

16.03.2019 kl. 12:46

283 masl

Markus (Unknown)

Danger Sign

Recent cracks

Whumpf sound

ObsID: 186583

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

Snow

16.03.2019 kl. 08:13

masl

drift@svv (**)

Weather

Snow -2 °C Arnøya (0moh) kl 07:00 10 cm nysnø akkumulert siste døgn. Snøfokk siste 12 timer.

Danger Sign

Recent snowdrift

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 186478

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.