Avalanche forecast for Trollheimen Sunday 2019-02-03

2
Moderate
Published:

There is a persistent weak layer buried in the snow pack, especially at tree line. Be careful in areas with wind deposited snow.

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow near surface

Keep distance to each other when traveling in avelanche terrain. NB, remote triggering is possible. 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 and cracking which means that you influence weak layers and should avoid avalanche terrain. However, absence of signs does not mean it is safe.
2 - Medium
Low additional load
Isolated steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of surface hoar

Keep distance to each other when traveling in avelanche terrain. NB, remote triggering is possible. 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 and cracking which means that you influence weak layers and should avoid avalanche terrain. However, absence of signs does not mean it is safe.
2 - Medium
Low additional load
Isolated steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Fresh breeze from southeast.
-15 °C to -10 °C at 1400 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
2 mm precipitation.
Breeze from south., change to fresh breeze from the west during the afternoon.
-14 °C to -8 °C at 1400 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Trollheimen / SURNADAL

Snow

02.02.2019 kl. 16:53

658 masl

jornf (Unknown)

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Incident

Snow Did not affect anything Backcountry skiing

Avalanche Observation

2. Feb 10:30 (+01:00) Dry slab avalanche 1 - Small Remotely triggered N-facing 30 cm high fracture In gully or concave form Lite skred fjernutløst på noen få meters avstand. Hard fokksnø skled ut på hardt skarelag. Lite ufarlig heng. Fjernutløst ovenfra der fokksnøen var mykere

ObsID: 178877

Trollheimen / Lønset, 62*41’48’’N, 9*8’2’’Ø

Snow

02.02.2019 kl. 15:15

923 masl

Sofie@ski (Unknown)

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Avalanche Observation

2. Feb 15:15 (+01:00) Dry slab avalanche 1 - Small Human triggered S-facing Avalanche release at 933 masl 35 cm high fracture Steep slope

ObsID: 178881

Trollheimen / Oppdal

Snow

01.02.2019 kl. 06:24

923 masl

torolav@obskorps (*****)

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Snow Profile

5 stratigraphy layers observed Typisk for skoggrensa. Det er her snødekket er mest komplekst

Avalanche Danger Assessment

2 Moderate Lenge sidan nedbør. Uttørking/ kantkorning har ført til at snøen har begynt å flytte på seg igjen. Fokksnøproblem bak større henteområder. Snødekket er komplekst med mange variasjoner med mykje kantkorn, spesielt i toppen av snødekke. Mest komplekst i skoggrensa. Det er lite/ ikkje spenning i eldre snødekke, men fersk fokksnø har spenning. Denne ligger delvis på svake tjukke lag av kantkorn. Ikkje observert rim her no. Vinden kan flytte kantkorn og gir små skredproblem i le. Underlaget/ snødekket blir stadig svakere, men også mindre spenning. Forecast correct fint

Avalanche Activity

1. Feb. During the day (+01:00) No avalanche activity

Weather

No precipitation -8 °C 12 m/s from SE ↖

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow near surface Within half a meter Easy to trigger 2 - Medium N, NE, W, NW above 700 masl Finnes flak som er store nok bak større henteområder. Legger seg på kantkorn

Danger Sign

Recent snowdrift Liten kuling/ kuling frå SØ flytter snø. Flaka er hovudsakleg tynne og små, men bak større henteområder er flaka større

Snow Cover

70 cm in total Some snow drift 0 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl. Layered snow begins at 0 masl Storm slab (soft slab) Dry Det er eit variert snødekke med harde og mjuke flak om ein anna, og laust kantkorn innimellom. Størst variasjon i skog og skoggrensa. Over skoggrensa er det hardare/ mindre flyttbart snødekke

ObsID: 178643

Trollheimen / D1505(45142) Indre Nordmøre 2015-2023

Snow

31.01.2019 kl. 13:50

73 masl

drift@svv (**)

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Avalanche Activity

31. Jan 13:55 (+01:00) - 30. Jan 13:55 (+01:00) Dry slab avalanche 1 - Small. Spontaneous release N. Between 300 masl and 200 masl Gjelder Rv70 Gråura (Slipran) - Sunndalsøra,

Weather

No precipitation 0 °C Gravem (200moh) kl 13:50

Danger Sign

Recent snowdrift

Recent avalanches

ObsID: 178569

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.