Avalanche forecast for Indre Sogn Saturday 2021-05-01

Highest danger level per day:
2
Moderate
Published:

There is a persistent weak layer buried in the snow cover that may be triggered by a skier or snowmobile, especially where the snow cover is thin. Triggering of dry wind slabs in slopes not exposed for sun is also possible. The possibility for wet snow loose avalanches in sunexposed slopes increases during the day.

Illustrasjon av ferdselsråd Wet surface: Move gradually away from the fall line when skiing on large slopes to avoid to be caught by small sluffs you or someone else in your group release while skiing.
Illustrasjon av ferdselsråd Dry surface: Avoid terrain steeper than 30 degrees and runout zones where the avalanche problem is present. Remote triggering is possible.
Illustrasjon av ferdselsråd Dry surface: NB: Identifying the avalanche problem is very difficult.
Illustrasjon av ferdselsråd Avoid terrain traps.

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow above a crust

Read more about the avalanche problem
3 - Large
High additional load
Isolated steep slopes
Possible

Wet snow (loose snow avalanches)

Loose snow

Read more about the avalanche problem
1 - Small
Low additional load
Isolated steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Calm/light breeze from northwest.
-16 °C to 2 °C at 1400 m a.s.l.
Plus degrees up to 1000 m a.s.l. during the afternoon.
Clear skies.

For updated info, please visit yr.no
0 mm precipitation.
Calm/light breeze from west.
-16 °C to 2 °C at 1400 m a.s.l.
Plus degrees up to 1200 m a.s.l. during the afternoon.
Clear skies.

For updated info, please visit yr.no

Observations the last 3 days

Indre Sogn / Luster

Snow

01.05.2021 kl. 18:18

316 masl

jostein@nve (*****)

Image Of Avalanche Activity
Image 1 of 1 Of:  Avalanche Activity Copyright:  jostein@nve

Avalanche Activity

1. May. 18-24 (+02:00) Glide avalanche One (1). 3 - Large. Spontaneous release Isolated steep slopes. SE. Between 1300 masl and 800 masl

ObsID: 270838

Indre Sogn / Sogndal

Snow

01.05.2021 kl. 16:00

1148 masl

AndersThorbeck (Unknown)

Image Of Avalanche Activity
Image 1 of 1 Of:  Avalanche Activity Copyright:  AndersThorbeck

Avalanche Activity

1. May. During the day (+02:00) Several (6-10). 1 - Small. Spontaneous release Isolated steep slopes. S

ObsID: 270856

Indre Sogn / Sogndal

Snow

30.04.2021 kl. 14:05

1468 masl

Hilde Strædet (Unknown)

Image Of Tests
Image 1 of 1 Of:  Tests Copyright:  Hilde Strædet

Tests

LBT@35cmQ2 Mye tilleggs belastning for å gå i brudd. Test tatt i SV helning.

Snow Profile

ObsID: 270727

Indre Sogn / Aurland

Snow

30.04.2021 kl. 13:33

976 masl

steinar@GeoRisiko.no (*****)

Image Of Snow Profile
Image 1 of 3 Of:  Snow Profile Copyright:  steinar@GeoRisiko.no
Image Of Snow Profile
Image 2 of 3 Of:  Snow Profile Copyright:  steinar@GeoRisiko.no
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Image 3 of 3 Of:  Snow Profile Copyright: 

Snow Profile

5 cm K MF D, 5 cm 4F FC 1 mm D, 10 cm P RGxf 1 mm D, 60 cm K MF D Topp må være 31.mars-skaren.

ObsID: 270742

Indre Sogn / Aurland

Snow

30.04.2021 kl. 10:20

1194 masl

steinar@GeoRisiko.no (*****)

Image Of Weather
Image 1 of 4 Of:  Weather Copyright:  steinar@GeoRisiko.no Comment:  Låvisdalen, mot nordøst.
Image Of Snow Profile
Image 2 of 4 Of:  Snow Profile Copyright:  steinar@GeoRisiko.no Comment:  1175 moh, NV leheng. HS 240 cm. Profil er 100 cm. Frosset hele øvre meteren og det er god trening å komme seg ned. Home-take 1: overflatekant med varierende utbredelse pga lokal himmelretning (vindutsatt på siste snøfall). Home-take 2: glatt brudd i 2-4 mm kantkorn mellom skarelag, her @60cm (der saga står).
Image Of Snow Profile
Image 3 of 4 Of:  Snow Profile Copyright:  steinar@GeoRisiko.no Comment:  Kanten mellom skarelag @60. Gridstørrelse 2mm.
Image Of Snow Profile
Image 4 of 4 Of:  Snow Profile Copyright: 

Weather

No precipitation -3.8 °C 3 m/s from SE ↖ Klarvær. Kaldt i skyggen. Varmt i sola. En liten trekk holder soloppvarming nede.

Avalanche Danger Assessment

Snødekket er stabilt. Snødekke tåler soloppvarming om ettermiddagen helt fint. Ingen våte skred siste uka.

Danger Sign

No signs observed

Tests

CTM15@60cmQ1 Good CTM@60 Q1 på 2-4 mm FC mellom skarelag. Overburden er frosset og svært stabil til det smelter.

Avalanche Activity

30. Apr. During the day (+02:00) No avalanche activity

Snow Profile

2 cm P MFcr D, 10 cm F FC 2 mm D Mektighet på overflatekant i øvre del av laget har stor lateral variasjon innan i profilveggen. Fra 1 til 15 cm. Dette skyldes tidligere vind, og fordeling av hard vs myk fokksnø., 20 cm P RG 1 mm Tidligere fuktet av sol. Nå frosset., 30 cm P MF 1 mm/3 mm D Topp er trolig 19.april-skaren., 1 cm I IF D, 1.5 cm F FC 2 mm/4 mm D Hele laget Kantkorn mellom skarelag. Klokkeklar Q1. Ikke et skredproblem før overliggende smelter., 40 cm K MF 3 mm D Smelteformer som er frosset. Noen løsere horisonter innimellom. -7.2 °C @ 0 cm, -8.6 °C @ 10 cm, -7 °C @ 20 cm, -5.5 °C @ 30 cm, -4.3 °C @ 40 cm, -3.7 °C @ 50 cm, -3.2 °C @ 60 cm, -2.6 °C @ 70 cm, -2.3 °C @ 80 cm, -2.1 °C @ 90 cm, -1.8 °C @ 100 cm 1 tests connected to snow profile Profil 1175 moh. NV, ikke vesentlig lunt leheng. Snødybde 240 cm.

ObsID: 270674

Indre Sogn / Sogndal

Snow

30.04.2021 kl. 09:09

1328 masl

Sander@ObsKorps (****)

Image Of Snow Profile
Image 1 of 9 Of:  Snow Profile Copyright:  Sander@ObsKorps
Image Of Snow Cover
Image 2 of 9 Of:  Snow Cover Copyright:  Sander@ObsKorps
Image Of Snow Cover
Image 3 of 9 Of:  Snow Cover Copyright:  Sander@ObsKorps
Image Of Weather
Image 4 of 9 Of:  Weather Copyright:  Sander@ObsKorps
Image Of Weather
Image 5 of 9 Of:  Weather Copyright:  Sander@ObsKorps
Image Of Snow Cover
Image 6 of 9 Of:  Snow Cover Copyright:  Sander@ObsKorps
Image Of Snow Cover
Image 7 of 9 Of:  Snow Cover Copyright:  Sander@ObsKorps
Image Of Snow Cover
Image 8 of 9 Of:  Snow Cover Copyright:  Sander@ObsKorps Comment:  10cm med små kantkorn rett under skare. Ved 1300moh i N-NØ vendt side.
Image Of Snow Profile
Image 9 of 9 Of:  Snow Profile Copyright: 

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow above a crust Within a meter Difficult to trigger 3 - Large N, NE, E, W, NW above 1200 masl

Weather

No precipitation -6.4 °C 2 m/s from SW ↗ Stabilt fint vær dei siste dagane. Kaldt på natta, mildt på dagen.

Avalanche Danger Assessment

2 Moderate Lik situasjon no som det har våre den siste veka+. Me har fortsatt kantkorn djupt i snødekket over 1200moh. Dette er vanskeleg å påverke. Lite forandring dei neste dagane. Er varsla nedbør søndags kveld og på mandag. Og litt mildare natt temperaturar. Forecast correct Bra beskrivelse i varselet.

Danger Sign

No signs observed Område: Generelt på fjellet

Snow Cover

120 cm in total No snowdrift 0 cm new snow Elevation of new snow 500 masl. Snow line at 500 masl Crust Dry Snøoverflata er stort sett hard. Over 1000-1100 moh er det hard fokksnø i N-leg sektor. Eg fann 10 cm med små kantkorn rett under tynn skare i overflata på 1300moh i N-NØ vendt side. Dette er ikkje eit problem no, sidan det ikkje er flak over.

Avalanche Activity

30. Apr. During the day (+02:00) No avalanche activity

Snow Profile

0.5 cm F SH 3 mm D, 1 cm P MFcr D, 0.3 cm F FCxr 1 mm D, 10 cm P RG 0 mm D, 1 cm K MFcr D, 18 cm P RG/RGxf 0 mm D, 0.5 cm K IF, 20 cm K RG 0 mm D

ObsID: 270700

Indre Sogn / Luster

Snow

29.04.2021 kl. 12:39

1880 masl

jostein@nve (*****)

Image Of Snow Cover
Image 1 of 2 Of:  Snow Cover Copyright:  jostein@nve
Image Of Snow Cover
Image 2 of 2 Of:  Snow Cover Copyright:  jostein@nve

Snow Cover

600 cm in total No snowdrift Storm slab (soft slab) Dry Litt rim på vindpakka mjuk snø. Rim også på flatmark ikkje berre i skugge

ObsID: 270737

Indre Sogn / Luster

Snow

28.04.2021 kl. 14:55

1160 masl

jostein@nve (*****)

Image Of Weather
Image 1 of 1 Of:  Weather Copyright:  jostein@nve

Weather

1 m/s 50% clouds Sola kjem ikkje nok igjennom til at snøen vert så våt at det går skred. Men den lagar 3cm fint skiføre

Snow Cover

Wet loose snow Wet Litt våt laussnø i solsida. Elles hardt / skare opp her til 1200 moh

ObsID: 270474

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.

For slope angle maps, download the app Varsom Regobs on App Store | Google Play or see our slope angle map at senorge.no ("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.