Avalanche forecast for Vest-Telemark Wednesday 2019-02-13

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  3. Avalanche forecast for Vest-Telemark Wednesday 2019-02-13

2
Moderate
Published:

Be careful in areas with fresh windloaded snow. Avoid lee areas where a persistent weak layer can be hidden in the snow pack. Avalanches are triggered most easily where the snow pack is thin, typically close to ridges and on convex formations.

Avalanche problems and travel advice

Wind drifted snow (slab avalanches)

Buried weak layer of new 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.
Avalanche size:
2 - Medium
Trigger/release:
Low additional load
Distribution:
Some steep slopes
Probability:
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.
Avalanche size:
3 - Large
Trigger/release:
High additional load
Distribution:
Isolated steep slopes
Probability:
Possible

What are avalanche problems?

0 mm precipitation.
Moderate gale from west., change to fresh breeze from the southwest.
-6 °C to -1 °C at 1400 m a.s.l.
Plus degrees up to 1100 m a.s.l. during the evening.
Cloudy.

For updated info, please visit yr.no
1 mm precipitation.
Strong breeze from northwest., change to strong breeze from the southwest during the evening.
-10 °C to -2 °C at 1400 m a.s.l.
Plus degrees up to 800 m a.s.l. during the evening.
Cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Rapportert av: audun@svv (***)

i kommune: VINJE

Avalanche evaluation

2 Moderate

Avalanche problems

Poor bonding between layers in wind deposited snow

Snow profile (2012)

Bilde av sjiktovergangene i fokksnøen

104511

Snow profile (2012)

104512

Snow profile (2012)

Snøprofil i østvendt på dette stedet

104514

Snow cover

198 cm snødybde

Coloumn test

Medium

ECTP17@35cmQ1

Dangersign

Recent snowdrift

Område: Generelt på fjellet. Beskrivelse: Det var mye vind tidligere i dag og med medfølgende drivsnø. Nå er det kun moderat snøfokk på toppene

Click here for pictures and the full observation

Rapportert av: jone@SVV (***)

i kommune: VALLE

Avalanche evaluation

2 Moderate

Avalanche problems

Buried weak layer of new snow

Avalanche problems

Poor bonding between layers in wind deposited snow

Avalanche problems

Buried weak layer of faceted snow above a crust

Snow profile (2012)

Ferskt fokksnøflak på toppen. Her var det fortsatt pålagring når jeg avsluttet arbeidet, men vinden har avtatt noe nå. Flere sjikt i gamle fokksnølag med ulik hardhet. Kant over skare, men denne begynner å bli myk og råtten. Nedre lag med smelteform er vekslende skare og kant/beger, men det vanskelig å skille de fra hverandre da grensen mellom dem undulerer noe. Beger i bunn.

104486

Snow profile (2012)

Snøprofil tatt i østvendt leheng.

104487

Snow cover

80 cm snødybde

Weather

No precipitation

3.0 grader

Coloumn test

Not given

ECTP25@26cmQ2

Avalanche activity

Several (6-10) 2 - Medium

Glide avalanche

Dangersign

Recent snowdrift

Område: I denne fjellsiden. Beskrivelse: Lett til middels snøfokk fra tregrensa og opp til ca. 1050 moh. Opp til ca. 900-950 moh. er snøoverflaten påvirket av mildvær og det er svært lite snø tilgjengelig for transport. Observerer også middels til kraftig snøfokk i fjellsidene sør for observasjonspunkt på vei opp. Dette hadde roet seg på veg ned fra fjellet. Transport fra vest mot øst.

Click here for pictures and the full observation

Rapportert av: audun@svv (***)

i kommune: VINJE

Snow cover

Weather

No precipitation

0.0 grader

Dangersign

Recent snowdrift

Dangersign

Recently made avalanches

Område: På dette stedet. Beskrivelse: Sett skred som har gått i går kveld nå i dagslys. Skred gått i går kveld ved væromslag. Levert inn egen RegObs observasjon

Click here for pictures and the full observation

Rapportert av: audun@svv (***)

i kommune: VINJE

Incident

Did not affect anything

Single avalanche

2 - Medium

Dry loose-snow avalanche

Click here for pictures and the full observation

Rapportert av: Jens@SVV (*****)

i kommune: VINJE

Weather

Rain

1.0 grader

Rapportert av: Rune Aa (Unknown)

i kommune: VINJE

Dangersign

Whumpf sound

Område: Generelt på fjellet. Beskrivelse: Masse drønn på mellom 7-800moh i åpent skogsterreng.

Rapportert av: Jens@SVV (*****)

i kommune: VINJE

Weather

Snow

-2.0 grader

See all observations - RegObs

Avalanche problems

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.