Avalanche forecast for Sunnmøre Monday 2019-03-18

2
Moderate
Published:

Locally unstable avalanche conditions above treeline. Be careful of recently loaded wind slabs. A persistent weak layer of facets may be triggered, especially where the snow cover is thin.

New snow (slab avalanches)

Buried weak layer of new snow

Be careful in steep slopes and around terrain traps 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.
2 - Medium
Low additional load
Specific steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow near surface

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)

3 mm precipitation.
Gale from southeast., change to strong breeze from the northeast during the afternoon.
-12 °C to -3 °C at 1400 m a.s.l.
Cloudy.

For updated info, please visit yr.no
3 mm precipitation.
Fresh breeze from north.
-10 °C to -3 °C at 1400 m a.s.l.
Plus degrees up to 100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Sunnmøre / ØRSTA

Snow

17.03.2019 kl. 11:51

369 masl

eskildskov (Unknown)

Image Of Weather
Image 1 of 2 Of:  Weather Copyright:  eskildskov Comment:  Noe snøtransport på toppene
Image Of Danger Sign
Image 2 of 2 Of:  Danger Sign Copyright:  Comment:  Minisastrugi

Weather

Drizzle 5 m/s from SE ↖ 100% clouds Lenger oppe i Finger-sida var det nok kuling i kastene. Varierende vindretning fra hele østlig sektor.

Snow Cover

Some snow drift Lett til moderat snøfokk

Danger Sign

Recent snowdrift

Avalanche Problems

Buried weak layer of new snow Within half a meter The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. The overlying slab is soft. Easy to trigger N, S, SW, W, NW Jeg fant ferske fokksnøflak i leheng, ca 10 cm tykkelse, 1F-4F som brøt lett oppå nedsnødd nysnølag. Q1-Q2 ut fra kjapptester.

ObsID: 186725

Sunnmøre / ØRSTA

Snow

17.03.2019 kl. 10:57

550 masl

KjetilMorken (Unknown)

Image Of Weather
Image 1 of 2 Of:  Weather Copyright:  KjetilMorken
Image Of Weather
Image 2 of 2 Of:  Weather Copyright:  KjetilMorken

Weather

from NE ↙ Vinden flytter tørr snø

ObsID: 186749

Sunnmøre / ØRSTA

Snow

16.03.2019 kl. 15:19

644 masl

Jarle Steinar (Unknown)

Image Of Avalanche Activity
Image 1 of 2 Of:  Avalanche Activity Copyright:  Jarle Steinar
Image Of Avalanche Activity
Image 2 of 2 Of:  Avalanche Activity Copyright:  Jarle Steinar

Avalanche Activity

16. Mar. 0-6 (+01:00) Dry slab avalanche One (1). Easy to trigger

ObsID: 186578

Sunnmøre / STRANDA

Snow

16.03.2019 kl. 14:20

1272 masl

eskildskov (Unknown)

Image Of Danger Sign
Image 1 of 2 Of:  Danger Sign Copyright:  eskildskov Comment:  Rimkrystaller
Image Of Weather
Image 2 of 2 Of:  Weather Copyright:  eskildskov

Weather

100% clouds Klarvær på formiddagen, skyet til helt utover dagen.

Snow Cover

No snowdrift Gravde flere snøprofiler, det ene stedet var det et rimlag som kollapset lett. Ca 1 m snø over gammelskaren. 5 m lenger bort var snøen over det gamle skarelaget halvparten så dyp. Ingen rim her. Kantkorn i overkant av gammelskaren. God stabilitet, ECTX.

Danger Sign

Surface hoar Område: På dette stedet. Beskrivelse: Ø-heng. På myk overflate. Så det kun i et par heng.

Tests

ECTP11@30cmQ1 Poor Brudd i rimlag

Avalanche Problems

Buried weak layer of surface hoar Within half a meter The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. The overlying slab is soft. A big and identifiable crystal in the weak layer. Easy to trigger

Avalanche Activity

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

ObsID: 186593

Sunnmøre / ØRSTA

Snow

16.03.2019 kl. 13:52

715 masl

Jarle Steinar (Unknown)

Image Of Avalanche Observation
Image 1 of 2 Of:  Avalanche Observation Copyright:  Jarle Steinar
Image Of Avalanche Observation
Image 2 of 2 Of:  Avalanche Observation Copyright:  Jarle Steinar

Avalanche Observation

16. Mar 13:40 (+01:00)

ObsID: 186565

Sunnmøre / ØRSTA

Snow

16.03.2019 kl. 13:40

715 masl

Jarle Steinar (Unknown)

Avalanche Observation

16. Mar 13:41 (+01:00) Dry slab avalanche 2 - Medium Remotely triggered W-facing Buried weak layer of surface hoar 80 cm high and 150 m wide fracture Lee side Grøtaksla

Danger Sign

Recent avalanches Område: På dette stedet. Beskrivelse:

Incident

Snow Did not affect anything Ski resort

ObsID: 186554

Sunnmøre / ØRSTA

Snow

16.03.2019 kl. 12:40

727 masl

Toggs (Unknown)

Image Of Tests
Image 1 of 2 Of:  Tests Copyright:  Toggs
Image Of Tests
Image 2 of 2 Of:  Tests Copyright:  Toggs

Weather

No precipitation -1 °C 2 m/s from E ← 40% clouds

Tests

ECTN13@13cm

ObsID: 186541

Sunnmøre / NORDDAL

Snow

16.03.2019 kl. 12:16

906 masl

Ernest (Unknown)

Weather

No precipitation 0 °C

Notes

Grov snøprofil hvor d ble konstantert en lagdeling med glatt bruddflate. Dette på ca 30 cm dybde. Under dette var det også flere lag uten at vi fikk brudd på disse. Fast solid snødekke på ca 60 cm dybde og ned til bakken.

Avalanche Problems

Dry slab avalanche Poor bonding between crust and overlying snow Within half a meter The overlying slab is soft. A big and identifiable crystal in the weak layer. Possible 3 - Large Specific steep slopes S between 1000 masl and 0 masl Vedvarene svakt lag. Ca 30 cm, men noe tilleggsbelastning måtte til for å løse ut. Snøprofil kollapset etter 9 slag fra albue. Er desverre ikke så bevandret innen benevnelsene til å angi dette på annen måte.

ObsID: 186631

Sunnmøre / Viddal

Snow

16.03.2019 kl. 10:23

552 masl

sondrep (Unknown)

Weather

No precipitation -3 °C 0 m/s

Avalanche Problems

Dry slab avalanche Buried weak layer of new snow Within half a meter The weak layer collapses easily and clean (easy propagation). Easy to trigger 2 - Medium SW I testhenget var det nok med belastning av en skiløper som gikk langs en konveks formasjon. Varierende tykkelse på fokksnølaget over laget med nedføyket løs nysnø.

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 2 - Medium SW Klarte ikke å påvirke kantkornlaget ved ECT i testhenget. Homogent lag med relativt hard fokksnø over kantkornet (ca. 65 cm tykt) i testhenget. Klarte å påvirke kantkornlaget og dermed løse ut fokksnølaget over med vekten av en skiløper (1 hopp) . Trolig at kantkornlaget er utbredt høyere opp i terrenget.

ObsID: 186579

Sunnmøre / VOLDA

Snow

15.03.2019 kl. 14:45

609 masl

Guro@friluftsliv_hivolda (Unknown)

Avalanche Danger Assessment

1 Low Forecast correct Dette er gravd på ca 600moh.

Weather

No precipitation 4 °C from S ↑ 80% clouds Ingen nedbør. Mildt vær.

Snow Cover

115 cm in total No snowdrift Crust Dry

Danger Sign

No signs observed

Tests

ECTX Good Det er grovkorna snø hele veien opp til ca 10 cm før overflaten, der er det delvis omhandlet helt til toppen.

Avalanche Problems

Loose snow

Avalanche Activity

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

ObsID: 186406

Sunnmøre / ØRSTA

Snow

15.03.2019 kl. 11:31

980 masl

eskildskov (Unknown)

Image Of Weather
Image 1 of 2 Of:  Weather Copyright:  eskildskov
Image Of Danger Sign
Image 2 of 2 Of:  Danger Sign Copyright:  eskildskov Comment:  Rimkrystaller? Eller er det kanskje nysnøkrystaller?

Weather

Danger Sign

Surface hoar Område: I denne fjellsiden. Beskrivelse: I vestvendt heng, ca 1100 moh.

ObsID: 186441

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.