Avalanche forecast for Vest-Telemark Tuesday 2019-03-19

2
Moderate
Published:

Locally unstable conditions. Be careful in areas with fresh wind deposited snow. Be aware that there can be pockets with persistent weak layer beneath wind deposited snow.

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
Spontaneous release
Specific steep slopes
Possible

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
High additional load
Isolated steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Fresh breeze from north.
-10 °C to -2 °C at 1100 m a.s.l.
Clear skies.

For updated info, please visit yr.no
1 mm precipitation.
Breeze from northwest., change to fresh breeze from the southwest during the evening.
-11 °C to -1 °C at 1100 m a.s.l.
Plus degrees up to 400 m a.s.l. during the afternoon.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Vest-Telemark / VALLE

Snow

19.03.2019 kl. 14:29

989 masl

NRHSpockeli (Unknown)

Image Of Snow Cover
Image 1 of 2 Of:  Snow Cover Copyright:  NRHSpockeli
Image Of Snow Cover
Image 2 of 2 Of:  Snow Cover Copyright:  NRHSpockeli

Snow Cover

Some snow drift Much loose snow (10-30cm) Mye små skred utløst av sol oppvarming.

ObsID: 187111

Vest-Telemark / VINJE

Snow

19.03.2019 kl. 13:43

1284 masl

Bård Henning@obskorps (***)

Image Of Weather
Image 1 of 2 Of:  Weather Copyright:  Bård Henning@obskorps
Image Of Snow Cover
Image 2 of 2 Of:  Snow Cover Copyright:  Bård Henning@obskorps

Avalanche Danger Assessment

1 Low Ikke observert noen fare tegn i denne fjellsiden Forecast too high

Danger Sign

No signs observed Område: I denne fjellsiden. Beskrivelse:

Weather

No precipitation -3 °C 3 m/s from SW ↗ 5% clouds

Tests

Good Vanskelig å få i brudd på S side

Snow Cover

Other Dry Vekslende mellom vindpakket hard og vinpåvirket myk snø

ObsID: 187093

Vest-Telemark / TINN

Snow

18.03.2019 kl. 21:36

1827 masl

AsbjørnF (Unknown)

Image Of Notes
Image 1 of 1 Of:  Notes Copyright:  AsbjørnF Comment:  Såg denne observasjonen på Facebook

Incident

Sjå skjermdump. Snow Did not affect anything

Notes

Avalanche Observation

18. Mar 15:00 (+01:00) Dry slab avalanche 2 - Medium Human triggered SW-facing 20 cm high and 36 m wide fracture In gully or concave form Eg har sett dette på Facebook, conditions at Gaustatoppen

ObsID: 186961

Vest-Telemark / Gaustatoppen

Snow

18.03.2019 kl. 12:30

1827 masl

Anders (Unknown)

Avalanche Observation

18. Mar 12:30 (+01:00) Dry slab avalanche 1 - Small Human triggered SW-facing Avalanche release at 1849 masl and ended at 1763 masl 20 cm high and 15 m wide fracture

ObsID: 186952

Vest-Telemark / VINJE

Snow

17.03.2019 kl. 08:57

985 masl

Rolf B. (**)

Weather

-4 °C 10 m/s from E ← 100% clouds

Avalanche Danger Assessment

Riktige

Snow Cover

100 cm in total Some snow drift 5 cm new snow Some loose snow (1-10cm) Dry

ObsID: 186649

Vest-Telemark / Gaustatoppen

Snow

16.03.2019 kl. 13:30

1844 masl

andre@forsvaret (***)

Image Of Snow Profile
Image 1 of 1 Of:  Snow Profile Copyright:  andre@forsvaret.no Comment:  Steinhardt islag på 10 cm i topp. Kun føyka snø på et par cm over dette. Flere lag med knivhard is under dette. Det svakeste laget i bunn er med hardhet «fist» og ser ut til å være melt-freeze-forms. Ingen depth hoars observert.

Snow Cover

ObsID: 186582

Vest-Telemark / Raulandsfjell

Snow

16.03.2019 kl. 12:17

1209 masl

svein@obskorps (****)

Image Of Weather
Image 1 of 5 Of:  Weather Copyright:  Comment:  1200moh
Image Of Snow Cover
Image 2 of 5 Of:  Snow Cover Copyright:  Comment:  1200moh
Image Of Snow Profile
Image 3 of 5 Of:  Snow Profile Copyright: 
Image Of Snow Profile
Image 4 of 5 Of:  Snow Profile Copyright: 
Image Of Avalanche Problems
Image 5 of 5 Of:  Avalanche Problems Copyright: 

Snow Profile

4 stratigraphy layers observed 1 Tests connected to snow profile

Avalanche Activity

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

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter Difficult to trigger 1 - Small N, W, NW above 1000 masl

Avalanche Danger Assessment

1 Low Stabile forhold i Raulandsområdet akkurat nå. Stort sett gode bindinger innad i fokksnøen. Ingen skred observert. Mye snø og vind de nærmeste dagene vil gjøre at skredfaren øker betraktelig.

Danger Sign

No signs observed

Weather

No precipitation -1 °C 2 m/s from N ↓ 10% clouds

Tests

ECTN12@20cmQ2

Snow Cover

80 cm in total No snowdrift 5 cm new snow Storm slab (soft slab) Dry Snøen som kom i uka er fremdeles løs og ubunden der sola ikke har tatt for mye. I solsidene er det vanskelig skiføre med smelt/frys skare. Over skoggrensa er det myke flak med fokksnø som preger snødekket. Snøen har bundet seg godt til det gamle harde snødekket. Det er og gode bindinger innad i fokksnøen.

ObsID: 186587

Vest-Telemark / VINJE

Snow

16.03.2019 kl. 11:00

1187 masl

Espen@rkh (Unknown)

Image Of Danger Sign
Image 1 of 2 Of:  Danger Sign Copyright:  Espen@rodekors
Image Of Danger Sign
Image 2 of 2 Of:  Danger Sign Copyright:  Espen@rodekors

Avalanche Danger Assessment

2 Moderate Forecast correct

Danger Sign

No signs observed Område: Generelt på fjellet. Beskrivelse: Vindtransportert snø generelt på hele fjellet

Weather

-1 °C 1 m/s from SW ↗ 60% clouds

ObsID: 186548

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.