Avalanche forecast for Vest-Telemark Monday 2019-01-21

2
Moderate
Published:

Be careful in lee areas with wind deposited snow, typically behind ridges, ribs and in gullies. A persistent weak layer can be present underneath fresh wind deposited snow in isolated features.

Wind drifted snow (slab avalanches)

Poor bonding between layers in wind deposited snow

Be careful and keep distance to each other in steep (above 30 degrees) terrain with fresh wind deposited snow, especially convex terrain. An avalanche is easier to trigger where wind slabs are thin or soft. Look for areas where the wind recently has deposited snow, typically behind ridges, ribs and in gullies. Remember that local wind effects will cause variation in where the wind slabs occur.
2 - Medium
High additional load
Some steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow beneath a crust

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
High additional load
Isolated steep slopes
Possible

What are avalanche problems?

0 mm precipitation.
Fresh breeze from northwest., change to breeze from the west during the afternoon.
-15 °C to -7 °C at 1400 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
0 mm precipitation.
Breeze from west.
-13 °C to -7 °C at 1400 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Rapportert av: pålr (Unknown)

i kommune: VINJE

Dangersign

Recently made avalanches

Område: I denne fjellsiden. Beskrivelse: 300m bredt og 150 høydemeter østvendt skred. Opp mot 1.5m bruddkant

Click here for pictures and the full observation

Rapportert av: NRH Emil (Unknown)

i kommune: VINJE

Dangersign

Recent snowdrift

Område: På dette stedet. Beskrivelse: Ligger mye snø i le sidene, mye lagdeling. Men ikke dypere en 50 cm

Rapportert av: Elisabet@obskorps (***)

i kommune: BYKLE

Avalanche evaluation

2 Moderate

Dangersign

No signs observed

Avalanche problems

Buried weak layer of new snow

Avalanche problems

Buried weak layer of faceted snow beneath a crust

Coloumn test

Good

ECTN23@23cmQ2

Coloumn test

Medium

ECTN5@12cmQ2

Weather

No precipitation

-5.0 grader

Snow cover

Snow profile

Antall Lag: 6

Total dybde: 63,00 cm

Click here for pictures and the full observation

Rapportert av: Laurids (Unknown)

i kommune: VINJE

Dangersign

Recent snowdrift

Avalanche problems

Buried weak layer of new snow

Coloumn test

Medium

CTM18@45cmQ2

Coloumn test

Poor

ECTP12@20cmQ2

Coloumn test

Good

CTN@0cmNot specified

Coloumn test

Good

ECTP25@25cmQ2

Rapportert av: Ingvild@Obskorps (***)

i kommune: VINJE

Dangersign

Recent snowdrift

Område: Generelt på fjellet. Beskrivelse: Kraftig vind frå vest. Det har kome litt snø dei siste dagane, som byggjer seg opp i lesidene.

Click here for pictures and the full observation

Rapportert av: Thomas1990@frivillig (**)

i kommune: VINJE

Dangersign

Recently made cracks

Område: I denne fjellsiden. Beskrivelse:

Dangersign

Recent snowdrift

Område: I denne fjellsiden. Beskrivelse:

Avalanche problems

Buried weak layer of new snow

Weather

Not observed

-4.0 grader

Click here for pictures and the full observation

Rapportert av: Bård Henning@obskorps (***)

i kommune: TINN

Avalanche evaluation

2 Moderate

Dangersign

Recent snowdrift

Område: I denne fjellsiden. Beskrivelse:

Weather

Not observed

Snow cover

Notes

Lite snø på Gaustatoppen. Avblåst, mye hard skare. Snøen ligger hardpakket i lesidene

Click here for pictures and the full observation

Rapportert av: Martine Slåtten (***)

i kommune: VINJE

Weather

No precipitation

10.0 grader

Snow profile (2012)

100706

Snow cover

Notes

Ble litt krøll med pc'n i etterkant så fikk ikke lagt inn skikkelig på web. Kort oppsummert mye fokksnø. Noen steder er det et lag på toppen som er hardere enn fokksnøen under. Eller et svakt lag av kantkorn (?) under skaren, ca. en halv meter dypt. Skal mye til å løse ut hvor det er mye snø siden det er mye hardpakket snø over. Men kan nok løse ut i områder med lite snødekke. Stabilitetstesten vil jeg kalle ugyldig, men det øverste harde laget på 10 cm løste lett ut, men ikke glatt brudd og propagerte ikke. Mulig start på rimkrystaller på overflaten i leområder.

Click here for pictures and the full observation

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.