Avalanche forecast for Nord-Troms Tuesday 2019-03-26

3
Considerable
Published:

Avoid areas with wind-deposited snow. It is also possible to trigger avalanches in a persistant weak layer in old snow, typically found in bowls and gullies where the snow cover is thin.

New snow (slab avalanches)

Buried weak layer of new snow

Avoid terrain traps and steep slopes until the new snow has stabilized. The avalanche problem is generally widely distributed on any steep slope with deep new snow. Look for cohesive new snow that breaks apart or is poorly bonded to the old snow. Cracks around your skis are a typical dangersign.
3 - Large
Low additional load
Specific steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow above 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.
3 - Large
High additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

5 mm precipitation, up to 12 mm in the most exposed areas.
Fresh breeze from northwest.
-12 °C to -6 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
5 mm precipitation.
Breeze from northwest., change to fresh breeze from the south during the evening.
-14 °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 / NORDREISA

Snow

26.03.2019 kl. 12:30

544 masl

StigR@obskorps (***)

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

Danger Sign

Recent avalanches Område: I denne fjellsiden. Beskrivelse: Naturlig utløste løssnøskred.

ObsID: 188268

Nord-Troms / KÅFJORD

Snow

26.03.2019 kl. 11:31

522 masl

StigR@obskorps (***)

Image Of Danger Sign
Image 1 of 3 Of:  Danger Sign Copyright:  StigR
Image Of Snow Profile
Image 2 of 3 Of:  Snow Profile Copyright:  StigR
Image Of Snow Profile
Image 3 of 3 Of:  Snow Profile Copyright: 

Avalanche Danger Assessment

3 Considerable Det er observert flere naturlig utløste løssnøskred i østvendte bratte heng på rundt 600-700 m ikke langt fra observasjonspunkt. Mye tørr løssnø som er eksponert for vindtransport dersom økning i vind. Over skarelag fra tidligere mildvær observeres ett tykkere lag med kantkorn. Pakkes snøen og danner flak over kantkorn kan det bli en utfordring der snødekket er tynnere. Forecast correct

Snow Cover

215 cm in total 20 cm new snow Elevation of new snow 0 masl Much loose snow (10-30cm) Dry Mye nysnø er kommet siste døgn. Under tregrense er det ca 30-40 cm tørr løssnø som er upåvirket av vind. Under løssnø, uten særlig lagdeling, er det utviklet kantkorn.

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow above a crust Within a meter A big and identifiable crystal in the weak layer. Difficult to trigger 3 - Large SW above 500 masl

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter The collapsing weak layer is thin < 3 cm. Easy to trigger 2 - Medium

Tests

ECTN11@12cmQ2 Good Brudd i svakt lag i nysnø/fokksnø

Danger Sign

Large snowfall Det har kommet mye snø siste døgn. Lite vind, men kraftig bygevær

Large snowfall Område: Generelt på fjellet

Weather

Snow -5.3 °C 2 m/s from E ← 75% clouds Varierende skydekke med bygevær.

Snow Profile

6 stratigraphy layers observed 9 temperature points observed 1 Tests connected to snow profile

ObsID: 188262

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

Snow

26.03.2019 kl. 07:31

masl

drift@svv (**)

Danger Sign

Large snowfall

Recent snowdrift

Weather

Snow -2 °C Arnøya (0moh) kl 06:00 25 cm nysnø akkumulert siste døgn. Snøfokk siste døgn.

ObsID: 188177

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

Snow

25.03.2019 kl. 06:24

masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 188012

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

Snow

25.03.2019 kl. 06:24

masl

drift@svv (**)

Danger Sign

No signs observed

ObsID: 188013

Nord-Troms / KÅFJORD

Snow

24.03.2019 kl. 11:30

422 masl

jan arild@obskorps (*****)

Image Of Snow Profile
Image 1 of 2 Of:  Snow Profile Copyright:  jan arild@obskorps Comment:  Nv vendt heng, skogsgrense. 25 cm4F/1F Fokksnø- 7 cm 4F kantkorn (1mm kornstørrelse)- 30cm K skare. Tot snødybde 110 cm
Image Of Tests
Image 2 of 2 Of:  Tests Copyright: 

Avalanche Danger Assessment

3 Considerable Pågående snøvær med vind vil legge ustabile fokksnøflak i le for sv vind. Skredfaren vil også styres av tilstedeværelse av vedvarende svakt lag av kantkorn som kan gå skred på ved stor tilleggsbelastning. I høyden er dette laget mer beskyttet i snødekket

Snow Cover

Wind slab (hard slab) Moist Snøbyger og vind over tregrensen. Ingen sikt. Sannsynlig at det vil legge seg ustabile fokksnøflak i bratte leheng

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow above a crust The weak layer collapses easily and clean (easy propagation). A big and identifiable crystal in the weak layer. Difficult to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW below 700 masl

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, E above 500 masl

Tests

ECTP14@25cmQ1 Medium

Avalanche Activity

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

Danger Sign

No signs observed

Weather

Sleet -1 °C from SW ↗ 100% clouds Økende vind og byger. Null sikt over tregrensen

ObsID: 187894

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

Snow

24.03.2019 kl. 09:26

masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

Danger Sign

No signs observed

Weather

No precipitation 5 °C Arnøya (0moh) kl 07:00 0 cm nysnø akkumulert siste døgn.

ObsID: 187861

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

Snow

23.03.2019 kl. 08:45

masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

Danger Sign

Quick temperature change

Recent snowdrift

Weather

Snow 5 °C Arnøya (0moh) kl 07:00 3 cm nysnø akkumulert siste døgn. Snøfokk siste 12 timer.

ObsID: 187701

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.