Avalanche forecast for Nord-Troms Thursday 2019-02-14

3
Considerable
Published:

Be careful in areas with newly deposited wind slabs. Persistent weak layers can be present where the snow cover is thin. Wet avalanches can occur where the percipitation comes as rain.

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
Widespread steep slopes
Possible

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.
2 - Medium
Spontaneous release
Specific steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow beneath a crust

Avoid skiing in avalanche terrain (steep terrain more than 30 degrees and in runout zones). NB, remote triggering is likely. 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.
2 - Medium
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Strong breeze from southeast., change to fresh breeze from the south during the evening.
-13 °C to -6 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
13 mm precipitation, up to 21 mm in the most exposed areas.
Moderate gale from south., change to gale from the west during the evening.
-11 °C to -3 °C at 1100 m a.s.l.
Plus degrees up to 500 m a.s.l. during the evening.
Cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Nord-Troms / Falsnes

Snow

14.02.2019 kl. 21:00

26 masl

drift@svv (**)

Incident

Snow Traffic stopped Road

Avalanche Observation

14. Feb 21:00 (+01:00) Snø på EV. 6 løsnet fra fjell/dalside 0-50m over veg. Anslått skredvolum: <10m^3. Blokkert veglengde: <10m.

ObsID: 195543

Nord-Troms / Falsnesfjellet

Snow

14.02.2019 kl. 21:00

113 masl

Ingrid@NVE (*****)

Avalanche Observation

14. Feb 21:00 (+01:00) -facing https://www.framtidinord.no/incoming/2019/02/14/Sn%C3%B8ras-sperrer-deler-av-et-kj%C3%B8refelt-p%C3%A5-E6-18476007.ece

ObsID: 181119

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

Snow

14.02.2019 kl. 17:16

masl

drift@svv (**)

Avalanche Danger Assessment

3 Considerable Betydelig skredfare (vurdert fra veg). Mye vind of snøbyger + temperatur økning. Økende skredfare neste døgn.

Danger Sign

Recent snowdrift

ObsID: 181004

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

Snow

13.02.2019 kl. 16:48

masl

drift@svv (**)

Avalanche Danger Assessment

2 Moderate Moderat skredfare (vurdert fra veg). Foreløpig 2, men forventet økning til 3 grunnet meldt vindøkning og nedbør. Økende skredfare neste døgn: Værmelding.

Danger Sign

Recent snowdrift

ObsID: 180792

Nord-Troms / KÅFJORD

Snow

13.02.2019 kl. 08:07

1025 masl

Ingrid@NVE (*****)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright:  Ingrid@NVE

Danger Sign

Recent snowdrift Område: For kommunen. Beskrivelse: Ser på webkamera at det er snøfokk, både på gamanjunni og nordnesfjellet. Vind frå sø, rundt 10m/s.

ObsID: 180661

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

Snow

13.02.2019 kl. 07:05

masl

drift@svv (**)

Weather

Snow -2 °C Arnøya (0moh) kl 06:00 5 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

ObsID: 180653

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

Snow

13.02.2019 kl. 07:05

masl

drift@svv (**)

Weather

Snow 0 °C Arnøya (0moh) kl 06:00 2 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

Danger Sign

Recent snowdrift

ObsID: 180887

Nord-Troms / STORFJORD

Snow

12.02.2019 kl. 14:17

522 masl

torben@obskorps (***)

Danger Sign

Whumpf sound Område: På dette stedet. Beskrivelse:

ObsID: 180560

Nord-Troms / STORFJORD

Snow

12.02.2019 kl. 14:13

522 masl

torben@obskorps (***)

Image Of Tests
Image 1 of 1 Of:  Tests Copyright:  torben@obskorps

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow near the ground Within half a meter The weak layer collapses easily and clean (easy propagation). The overlying slab is soft. A big and identifiable crystal in the weak layer. Easy to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW above 500 masl

Dry slab avalanche Buried weak layer of faceted snow beneath a crust Within half a meter The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. Easy to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW above 500 masl

Tests

ECTPV@30cmQ1 Poor Løsnet på kantkorn 2mm.under skare, også kantkorn på bunnen/bakken.

Avalanche Activity

12. Feb. During the day (+01:00) No avalanche activity til tider god sikt og oversikt over området.

Snow Cover

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

Danger Sign

Whumpf sound på dette platået. Tynt snødekke over svak kul form

ObsID: 180559

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

Snow

12.02.2019 kl. 06:41

masl

drift@svv (**)

Weather

Snow 0 °C Arnøya (0moh) kl 06:00 25 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

Danger Sign

Recent snowdrift

ObsID: 180446

Nord-Troms / KÅFJORD

Snow

11.02.2019 kl. 12:53

516 masl

StigR@obskorps (Unknown)

Snow Cover

130 cm in total No snowdrift 10 cm new snow Elevation of new snow 20 masl. Snow line at 0 masl Some loose snow (1-10cm)

Avalanche Danger Assessment

2 Moderate Forecast correct

Weather

-8 °C 6 m/s from SE ↖ 95% clouds Lette snbyger

Danger Sign

No signs observed

Avalanche Problems

Dry slab avalanche Within half a meter Difficult to trigger Possible Not given above 0 masl

ObsID: 180346

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

Snow

11.02.2019 kl. 07:07

masl

drift@svv (**)

Weather

Snow -2 °C Arnøya (0moh) kl 06:00 2 cm nysnø akkumulert siste døgn.

Danger Sign

No signs observed

ObsID: 180241

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.