Avalanche forecast for Indre Sogn Sunday 2019-03-17

3
Considerable
Published:

The snowpack is very unstable. Avoid areas with wind-deposited snow. It is also possible to trigger avalanches in a persistant weak layer in old snow found in bowls and gullies.

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.
2 - Medium
Spontaneous release
Widespread 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
High additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

8 mm precipitation, up to 18 mm in the most exposed areas.
Gale from southeast., change to fresh breeze from the northeast during the afternoon.
-10 °C to -4 °C at 1400 m a.s.l.
Plus degrees up to 300 m a.s.l. during the afternoon.
Cloudy.

For updated info, please visit yr.no
2 mm precipitation.
Breeze from southeast.
-12 °C to -4 °C at 1400 m a.s.l.
Plus degrees up to 400 m a.s.l. during the evening.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Indre Sogn / Fivla

Snow

17.03.2019 kl. 12:50

986 masl

jan@nordfjordfhs (Unknown)

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

Weather

No precipitation -3 °C 13 m/s from SE ↖ 100% clouds

Avalanche Danger Assessment

2 Moderate Forecast correct

Avalanche Activity

17. Mar. During the day No avalanche activity

Snow Cover

117 cm in total Heavy snow drift 20 cm new snow Storm slab (soft slab) Dry

Danger Sign

Recent snowdrift

Avalanche Problems

Buried weak layer of faceted snow beneath a crust Within half a meter The collapsing weak layer is thin < 3 cm. The overlying slab is soft. Difficult to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW above 800 masl

Snow Profile

6 stratigraphy layers observed 5 temperature points observed 1 Stability tests connected to snow profile Gravde kun til omlag 45 cm.Snødekket var ca 120 cm.

Notes

I går var snøen veldig fuktig heilt opp til hytta på Fivla. Vinden tok godt tak i natt og i dag. Eg burde nok ha gravd i eit heng som var litt brattare og samla litt meir snø. Fokksnøen var meir stabil enn eg trudde. Håndtestar vidare nedover tyda på det samme.

ObsID: 186797

Indre Sogn / LUSTER

Snow

17.03.2019 kl. 11:58

206 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

Heavy snow drift Kraftig snøfokk på toppane. Sterk vind heilt ned i dalen. Mange stader får me no i dag fyrste pålagring og flakdanning i snøen over gamal skare der det mange stader kan ligge kantkorn.

ObsID: 186728

Indre Sogn / LUSTER

Snow

17.03.2019 kl. 11:58

206 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

Heavy snow drift Kraftig snøfokk på toppane. Sterk vind heilt ned i dalen. Mange stader får me no i dag fyrste pålagring og flakdanning i snøen over gamal skare der det mange stader kan ligge kantkorn.

ObsID: 186729

Indre Sogn / SOGNDAL

Snow

16.03.2019 kl. 14:48

619 masl

Sigbjørn (***)

Notes

Våtte laussnø skred frå 1100moh. Alle himmelretningar.

ObsID: 186569

Indre Sogn / SOGNDAL

Snow

16.03.2019 kl. 14:16

1125 masl

Sigbjørn (***)

Image Of Notes
Image 1 of 1 Of:  Notes Copyright:  Sigbjørn

Avalanche Activity

16. Mar. 12-18 Loose wet avalanche One (1). 1 - Small. Easy to trigger Widespread steep slopes. SE, S, SW Nysnøen som kom i natt. Opp på smelt frys skare, torsdag.

Notes

ObsID: 186563

Indre Sogn / LUSTER

Snow

16.03.2019 kl. 13:59

1116 masl

Sigrun@SVV (Unknown)

Danger Sign

Whumpf sound

ObsID: 186555

Indre Sogn / SOGNDAL

Snow

16.03.2019 kl. 10:17

118 masl

Siggen@obskorps (****)

Image Of Weather
Image 1 of 1 Of:  Weather Copyright:  Siggen@obskorps Comment:  Snør store filler på 100moh. Men pluss 2 så snøen legger seg ikke helt.

Weather

Snow 2 °C 0 m/s 100% clouds Snø store filler nå, men kommer å går litt. Overskyet dårlig sikt i høyfjellet, ser det ut til. Her på 100moh, er det pluss 2 i luften. Så snøen smelter noe på bakken, men legger seg litt også.

ObsID: 186503

Indre Sogn / SOGNDAL

Snow

16.03.2019 kl. 08:05

189 masl

Sander@ObsKorps (***)

Image Of Weather
Image 1 of 2 Of:  Weather Copyright:  Sander@ObsKorps Comment:  Snø i lufta.
Image Of Weather
Image 2 of 2 Of:  Weather Copyright:  Sander@ObsKorps Comment:  5min seinare. Tett snøvær.

Weather

Snow 0.3 °C 0 m/s 100% clouds Snøa lett i går kveld, men vart ikkje meir enn ca 0.5-1cm. Har starta å snøa igjen no. Obs frå 200moh. Til tider tette snøbyger, men vert ikkje noko nysnømengd å snakka om.

ObsID: 186476

Indre Sogn / Salen

Snow

15.03.2019 kl. 15:35

1329 masl

Joachim (Unknown)

Danger Sign

Whumpf sound Solid drønn under bratt heng

ObsID: 186434

Indre Sogn / LUSTER

Snow

15.03.2019 kl. 13:27

1101 masl

jostein@nve (*****)

Avalanche Danger Assessment

Her var det vanskeleg å finne nok flakdanning i overflata til at ein har noko skredproblem å snakke om

Avalanche Activity

15. Mar. During the day No avalanche activity

Danger Sign

No signs observed

ObsID: 186397

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.