Avalanche forecast for Vest-Telemark Sunday 2019-02-24

2
Moderate
Published:

Persistent weak layers are a problem at high elevations. Wet avalanches can release in steep terrain in lower areas because of sun and high temperatures. Avoid areas with visible gliding cracks, release areas and run out areas for wet snow avalanches.

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.
3 - Large
Low additional load
Isolated steep slopes
Possible

Wet snow (loose snow avalanches)

Loose snow

Be careful in avalanche release and runout areas. Avoid skiing in terrain traps. Timing is important. Stability decreases when the snow surface gets wet and soft. Wet snow avalanches tend to release spontaneously.
1 - Small
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Strong breeze from west.
-3 °C to 4 °C at 1100 m a.s.l.
Plus degrees up to 900 m a.s.l. sunday night.
Partly cloudy.

For updated info, please visit yr.no
0 mm precipitation.
Fresh breeze from southwest., change to moderate gale from the southwest during the evening.
-2 °C to 4 °C at 1100 m a.s.l.
Plus degrees up to 2000 m a.s.l. during the afternoon.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Vest-Telemark / BYKLE

Snow

23.02.2019 kl. 13:00

1098 masl

Elisabet@obskorps (***)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  Elisabet@obskorps Comment:  Bærende skare m litt sløsj

Snow Cover

ObsID: 182666

Vest-Telemark / VINJE

Snow

23.02.2019 kl. 08:48

985 masl

Rolf B. (**)

Weather

0 °C 0 m/s 70% clouds Stabilt mildt

Snow Cover

80 cm in total Very wet

ObsID: 182606

Vest-Telemark / VINJE

Snow

22.02.2019 kl. 16:05

1127 masl

håkon@obskorps (***)

Image Of Weather
Image 1 of 2 Of:  Weather Copyright:  håkon@obskorps
Image Of Snow Cover
Image 2 of 2 Of:  Snow Cover Copyright:  håkon@obskorps Comment:  Hard en cm skare før fuktig fokksnø.

Weather

No precipitation -0.5 °C 0 m/s 100% clouds

Avalanche Danger Assessment

2 Moderate Har vært under null i dag men forventes en tempratur økning i morgen som vil muligens føre til noen naturlige utløste skred. Mildværet kommede dager vil stabilisere snødekket og forhåpentligvis fjerne vedvarende svake lag. Forecast correct

Danger Sign

No signs observed

Snow Cover

No snowdrift Crust Dry

Avalanche Problems

Wet slab avalanche Buried weak layer of faceted snow beneath a crust The collapsing weak layer is thin < 3 cm. Difficult to trigger Possible 2 - Medium Specific steep slopes N, NE, E, SE, S, SW, W, NW above 0 masl

Tests

CTH24@60cmQ2 Good

Avalanche Activity

22. Feb. During the day No avalanche activity Dårlig sikt

ObsID: 182555

Vest-Telemark / Raulandsfjell

Snow

22.02.2019 kl. 11:21

1219 masl

svein@obskorps (****)

Image Of Weather
Image 1 of 3 Of:  Weather Copyright:  Comment:  Tett tåke over ca 900moh
Image Of Snow Profile
Image 2 of 3 Of:  Snow Profile Copyright: 
Image Of Tests
Image 3 of 3 Of:  Tests Copyright: 

Weather

No precipitation -2 °C 1 m/s from W → 100% clouds

Avalanche Danger Assessment

2 Moderate Det finnes fortsatt kantkorna snø under skarelag fra ca 1000moh og oppover. Vær obs i bratte heng der skarelaget er tynnt. Stigende temperatur vil øke skredfaren,spesielt i sydvendte der solen tar.

Snow Profile

6 stratigraphy layers observed

Snow Cover

70 cm in total No snowdrift 0 cm new snow Some loose snow (1-10cm) Løs fuktig snø opp til ca 1000moh . Gradvis hardere og tørrere oppover i fjellet. Ved 1050moh er snøen fuktig til bakken. Ved 1220moh er snøen tørr. Over skoggrensa der vinden har tatt er det det et tykt skarelag over løsere lag med kantkorna snø.

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow beneath a crust Within half a meter A big and identifiable crystal in the weak layer. Difficult to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW above 1000 masl

Tests

ECTP16@40cmQ2

ObsID: 182511

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.