Avalanche forecast for Sør-Troms Saturday 2019-03-16

3
Considerable
Published:

A persistent weak layer of facets is lingering above the February 23 crust layer, and is proving very reactive in the northern parts of the region. Avoid recently loaded areas with wind slabs as these areas can be triggered.

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
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

6 mm precipitation.
Fresh breeze from west.
-11 °C to -4 °C at 700 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
2 mm precipitation.
Breeze from northeast.
-11 °C to -3 °C at 700 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Sør-Troms / LENVIK

Snow

16.03.2019 kl. 15:02

383 masl

HåvardKreyHansen (Unknown)

Image Of Avalanche Observation
Image 1 of 1 Of:  Avalanche Observation Copyright:  HåvardKreyHansen
ObsID: 186572

Sør-Troms / D1909(55220) Hinnøy 2015-2020

Snow

16.03.2019 kl. 14:01

masl

drift@svv (**)

Avalanche Danger Assessment

3 Considerable Betydelig skredfare (vurdert fra veg). Varsom. No. Uforandret skredfare neste døgn.

Danger Sign

No signs observed

ObsID: 186558

Sør-Troms / BERG

Snow

16.03.2019 kl. 13:25

512 masl

Lars Berge (Unknown)

Image Of Notes
Image 1 of 2 Of:  Notes Copyright:  Lars Berge Comment:  Grov ned til 110cm. Myk fokksno helt ned til 60cm. Herfra og ned var det hardt is/skare helt ned. Lille blokktest; Brudd etter 5. Slag, 50cm fra toppen.
Image Of Notes
Image 2 of 2 Of:  Notes Copyright:  Lars Berge Comment:  30cm hardt islag helt nederst.

Snow Cover

Some snow drift 3 cm new snow Much loose snow (10-30cm)

Weather

-2 °C 6 m/s from S ↑ 70% clouds

Notes

Danger Sign

Recent snowdrift Område: I denne fjellsiden. Beskrivelse:

ObsID: 186643

Sør-Troms / spanst5nd

Snow

16.03.2019 kl. 12:52

1363 masl

magnus@obskorps (****)

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter Easy to trigger 1 - Small E, SE, S inget stort problem. ca 10-20 nysnö. ingen fortplantning men binder dåligt mot fokksnen

Danger Sign

Recent snowdrift

ObsID: 186600

Sør-Troms

Snow

16.03.2019 kl. 12:24

460 masl

fred@obskorps (***)

Snow Cover

150 cm in total Some snow drift 15 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl. Layered snow begins at 400 masl Some loose snow (1-10cm) Dry Under tregrensen ligger det mer tør snø en over, ca 20 cm. Over tregrensen ligger det ca 10cm jevnt fordelt i terrenget.

Weather

Snow -2 °C 4 m/s from W → 50% clouds

Avalanche Problems

Buried weak layer of faceted snow above a crust Within a meter The collapsing weak layer is thin < 3 cm.

Danger Sign

Recent avalanches Observerte 2 skred størrelse 1+. få bratte heng mot S

ObsID: 186606

Sør-Troms

Snow

16.03.2019 kl. 08:07

45 masl

Espen@ObsKorps (*****)

Image Of Weather
Image 1 of 1 Of:  Weather Copyright:  Espen@ObsKorps Comment:  5 cm nysnø på bilen i morges.

Weather

Snow 1 m/s from SW ↗ 100% clouds 5 cm snø ila natten.

ObsID: 186501

Sør-Troms / BERG

Snow

15.03.2019 kl. 14:32

319 masl

Lars Berge (Unknown)

Image Of Notes
Image 1 of 3 Of:  Notes Copyright:  Lars Berge Comment:  Total snødybde målt til 3,4m. Gravde ned til 1,0m, her var det et hardt lag ned is skare som var ganske vanskelig å komme gjennom med spaden
Image Of Notes
Image 2 of 3 Of:  Notes Copyright:  Lars Berge Comment:  2 lette slag med spaden i siden og hele blokka skled av
Image Of Notes
Image 3 of 3 Of:  Notes Copyright:  Lars Berge Comment:  Antar denne klassifiseres som Q1

Snow Cover

No snowdrift 25 cm new snow Much loose snow (10-30cm) 25cm løssnø over et tynt skare-/islag på ca 1cm etterfølgt av myk vindtransportert snø på 55cm. Under her igjen var det et kantkornlag over is/skare. Lille blokktest; løsnet i karntkornlaget etter 2 lette slag i siden. Fin over flate (Q1?) avstand fra toppen 80cm Se bilder under notater

Weather

No precipitation -2 °C 2 m/s from SE ↖ 70% clouds

Notes

ObsID: 186436

Sør-Troms / D1816(55220) Ofoten 2018-2023

Snow

15.03.2019 kl. 13:23

masl

drift@svv (**)

Avalanche Activity

15. Mar 22:25 - 14. Mar 22:25 Loose dry avalanche 1 - Small. Spontaneous release SE. Between 1000 masl and 900 masl Gjelder Fv848 Løksetinden - Seterlia,

ObsID: 186442

Sør-Troms / LAVANGEN

Snow

15.03.2019 kl. 10:57

391 masl

Snowman (Unknown)

Image Of Avalanche Observation
Image 1 of 5 Of:  Avalanche Observation Copyright:  Snowman
Image Of Avalanche Observation
Image 2 of 5 Of:  Avalanche Observation Copyright:  Snowman Comment:  Små kantkorn over skare.
Image Of Avalanche Observation
Image 3 of 5 Of:  Avalanche Observation Copyright:  Snowman
Image Of Avalanche Observation
Image 4 of 5 Of:  Avalanche Observation Copyright:  Snowman Comment:  Enda en bruddkant lengre ned i skredbanen.
Image Of Avalanche Observation
Image 5 of 5 Of:  Avalanche Observation Copyright:  Snowman

Avalanche Observation

15. Mar 10:57 Dry slab avalanche 1 - Small Human triggered N-facing Buried weak layer of faceted snow above a crust 40 cm high and 50 m wide fracture In gully or concave form Henrikas dotter

Incident

Under anmarsj til isklatring. Hadde avdekket flakdannelse og svakt lag tidligere på anmarsj. Tok hensyn til dette og gikk øverst på snøflaten med tau og satte isskruer under travers inn mot innsteg. Ble ikke ovverasket at skredet gikk. Ringte politiet for å melde inn at ingen ble påvirket av skredet. Klatret fossenog gikk ned skredbanen etterpå. Den var 500-600 meter lang. Snow Did not affect anything Climbing

ObsID: 186439

Sør-Troms / LAVANGEN

Snow

15.03.2019 kl. 09:30

50 masl

Snowman (Unknown)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  Snowman Comment:  Flakdannelse med svakt lag under.

Snow Cover

ObsID: 186437

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.