Avalanche forecast for Nord-Troms Monday 2019-03-11

2
Moderate
Published:

Locally unstable conditions. Be aware that there can be pockets with unstable wind slabs.

Wind drifted snow (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.
2 - Medium
High additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Breeze from northeast., change to breeze from the southeast during the evening.
-19 °C to -13 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
1 mm precipitation.
Fresh breeze from southwest., change to breeze from the northwest during the afternoon.
-16 °C to -10 °C at 1100 m a.s.l.
Cloudy.

For updated info, please visit yr.no

Observations the last 3 days

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

Snow

11.03.2019 kl. 07:22

masl

drift@svv (**)

Weather

No precipitation -5 °C Arnøya (0moh) kl 07:00

Danger Sign

No signs observed

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 185496

Nord-Troms / Uløyabukt

Snow

10.03.2019 kl. 16:18

286 masl

Marcel (Unknown)

Image Of Avalanche Activity
Image 1 of 1 Of:  Avalanche Activity Copyright:  Marcel Bak

Avalanche Activity

10. Mar. 12-18 (+01:00) Dry slab avalanche One (1). 1 - Small. Easy to trigger Isolated steep slopes. NE. Below 300 masl Cornice collapsed under the load created by two skiers (no victims, both skiers stopped above the slab in safe places). No skiers were below the cornice. Crown of the avalanche was 35 meters wide.

ObsID: 185424

Nord-Troms / KÅFJORD

Snow

10.03.2019 kl. 13:40

697 masl

StigR@obskorps (***)

Image Of Snow Profile
Image 1 of 1 Of:  Snow Profile Copyright: 

Weather

No precipitation -10 °C 2 m/s from N ↓ 20% clouds

Snow Cover

230 cm in total No snowdrift 5 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl Some loose snow (1-10cm) Dry

Notes

Lille blokktest utført. Brudd over eldre skarelag på ca 40 cm. Q3 brudd. Høy belastning ved klapping like over skarelaget.

Avalanche Activity

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

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

Snow Profile

4 stratigraphy layers observed 4 temperature points observed Et tykt skarelag formentlig fra mildværsperiode.

ObsID: 185371

Nord-Troms / KÅFJORD

Snow

10.03.2019 kl. 11:06

489 masl

jan arild@obskorps (*****)

Image Of Weather
Image 1 of 4 Of:  Weather Copyright:  jan arild@obskorps
Image Of Notes
Image 2 of 4 Of:  Notes Copyright:  jan arild@obskorps Comment:  40 cm fokksnø 4F-1F over tykt og knivhard is/skare. Begynnende kantkorn over skare -8 ved snøoverflaten/ -3 over skatelaget. Ectp24@27Q2. Brudd i sjiktovergang i fokksnø
Image Of Snow Cover
Image 3 of 4 Of:  Snow Cover Copyright:  Comment:  Begynnende kantkorndannelse over hardt skarelag
Image Of Snow Profile
Image 4 of 4 Of:  Snow Profile Copyright: 

Weather

No precipitation -8 °C

Snow Cover

100 cm in total No snowdrift Wind slab (hard slab) Dry Litt løssnø i skogen. Vindparket over tregrensen. Gamnel skare konmer frem over rygger. Begynnende kantkorndannelse over skarelag/under ffokksnø fra tidligere i uken. Enkelte drønn i skogen som forplanter seg en radius på 5-6 meter

Tests

ECTP23@27cmQ2

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. Difficult to trigger 2 - Medium E, SE, S above 400 masl

Avalanche Danger Assessment

2 Moderate Fokksnøflak er i ferd med å stabilisere seg, men fortsatt er det mulig å løse ut flakskred i Ø/SØ vendte bratte leheng, da med stor tilleggsbelastning. Skredfaren vurderes til FG2 Værutsikter fremover tilsier ingen store endringer i skredfaren

Snow Profile

5 stratigraphy layers observed 2 temperature points observed 1 Tests connected to snow profile

ObsID: 185327

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

Snow

10.03.2019 kl. 08:22

masl

drift@svv (**)

Weather

Snow -4 °C Arnøya (0moh) kl 07:00 5 cm nysnø akkumulert siste døgn. Snøfokk siste 12 timer.

Danger Sign

No signs observed

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 185283

Nord-Troms / KÅFJORD

Snow

09.03.2019 kl. 17:47

481 masl

StigR@obskorps (***)

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

Weather

-4 °C 6 m/s from N ↓ 100% clouds

Danger Sign

Recent snowdrift Område: Generelt på fjellet. Beskrivelse: Snøfokk over løsere lag med nysnø som stedvis gir hardere sammenpakket overflate

Snow Cover

Some snow drift Much loose snow (10-30cm) Dry

ObsID: 185211

Nord-Troms / KÅFJORD

Snow

09.03.2019 kl. 17:09

246 masl

StigR@obskorps (***)

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

Weather

-4 °C 5 m/s from NW ↘ 100% clouds Snefall samt mye løs snø for vindtransport

Danger Sign

Recent snowdrift Område: I denne fjellsiden. Beskrivelse:

ObsID: 185205

Nord-Troms / SKJERVØY

Snow

09.03.2019 kl. 14:21

466 masl

Hans-Jørgen@ObsKorps (***)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  Hans-Jørgen@ObsKorps

Snow Cover

10-30 cm ubunden snø i Ø sektor opp mot 500 moh. God binding - ingen flakdannelser. Ett drønn i konveks formasjon på 300 moh. Ellers ingen faretegn. Faregrad 2 riktig.

ObsID: 185223

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

Snow

09.03.2019 kl. 08:21

masl

drift@svv (**)

Danger Sign

No signs observed

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 185072

Nord-Troms / KÅFJORD

Snow

08.03.2019 kl. 14:51

893 masl

jan arild@obskorps (*****)

Image Of Snow Profile
Image 1 of 1 Of:  Snow Profile Copyright: 

Snow Cover

No snowdrift 0 cm new snow Storm slab (soft slab) Dry 8-10 cm løssnø i skogen. Over tregrense mer bundtet fokksnø men litt løssnø i isolerte områder. I høyden mer vindpakket hardt og glatt skare i overflaten. Tykt lag (10-12 cm) med kantkorn under dette skarelaget hvor snødekket er tynt. Ved tregrense observert begynnende kantkornlag over skare og under den ferske fokksnøen. Stor temperaturgradient men t¨ler stor belastning

Tests

ECTN17@30cmQ2 Good

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. Difficult to trigger 2 - Medium E, SE, S above 400 masl

Avalanche Danger Assessment

2 Moderate Fokksnøflak som NV har pålagret i leområder er i ferd med å stabilisere seg. Får ingen respons på tester selv ved mye belastning i testheng. Ingen faretegn eller noen skred observert de siste dagene i Nord-Troms. Over rygger i høyden kan smindre fokksnøflak ligger over glatt skare og lett løsne ved liten tilleggsbelastning. Men størrelsen på evt skred vil bli små. Vurderer at FG 2 for regionen vil¨være riktig Rolige værutsikter og fortsatt stabiliseringen av fokksnøflak. Forecast too high

Snow Profile

5 stratigraphy layers observed 1 Tests connected to snow profile Vestvendt brattheng 900 moh. God stabilitet

ObsID: 184965

Nord-Troms / KÅFJORD

Snow

08.03.2019 kl. 10:43

410 masl

jan arild@obskorps (*****)

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

Snow Cover

0 cm new snow Some loose snow (1-10cm) Mer vindpåvirket ved tregrensen

ObsID: 184958

Nord-Troms / KÅFJORD

Snow

08.03.2019 kl. 09:45

10 masl

jan arild@obskorps (*****)

Image Of Weather
Image 1 of 1 Of:  Weather Copyright:  jan arild@obskorps

Weather

No precipitation -13 °C 10% clouds Klarvær og kaldt tilskyende i sør

ObsID: 184857

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

Snow

08.03.2019 kl. 07:59

masl

drift@svv (**)

Danger Sign

No signs observed

Avalanche Activity

No avalanche activity Gjelder Fv347 Lauksundskaret - Arnøyhamn,

ObsID: 184840

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.