Avalanche forecast for Vest-Telemark Monday 2019-03-11

2
Moderate
Published:

Locally unstable wind slabs. Also be careful in steep and sunexposed terrain.

Illustrasjon av ferdselsråd 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.
Illustrasjon av ferdselsråd Be careful near terrain traps and in large steep slopes until the new snow has stabilized. Move gradually away from the fall line when skiing on large slopes to avoid to be caught by small sluffs you released while skiing. The avalanche problem is generally widely distributed on any steep slope with deep new snow.

Wind drifted snow (slab avalanches)

Buried weak layer of new snow

Read more about the avalanche problem
2 - Medium
Spontaneous release
Specific steep slopes
Possible

New snow (loose snow avalanches)

Loose snow

Read more about the avalanche problem
1 - Small
Spontaneous release
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Breeze from northwest.
-15 °C to -6 °C at 1100 m a.s.l.
Plus degrees up to 400 m a.s.l. during the afternoon.
Clear skies.

For updated info, please visit yr.no
0 mm precipitation.
Breeze from northwest.
-17 °C to -5 °C at 1100 m a.s.l.
Plus degrees up to 400 m a.s.l. during the afternoon.
Clear skies.

For updated info, please visit yr.no

Observations the last 3 days

Vest-Telemark / TINN

Snow

10.03.2019 kl. 14:30

1094 masl

Sondre (Unknown)

Image Of Avalanche Activity
Image 1 of 2 Of:  Avalanche Activity Copyright:  Sondre
Image Of Avalanche Activity
Image 2 of 2 Of:  Avalanche Activity Copyright:  Sondre

Avalanche Activity

12. Mar. During the day Dry slab avalanche Few (2-5). 1 - Small. Spontaneous release Isolated steep slopes. SE. Between 900 masl and 0 masl Observerte to skred bak skipsheisen i Gaustablikk skisenter Søndag 10.03.19. De så ut til å være noen dager gamle.

ObsID: 185854

Vest-Telemark / VINJE

Snow

09.03.2019 kl. 08:46

987 masl

Rolf B. (**)

Weather

-5 °C 0 m/s 100% clouds

Snow Cover

100 cm in total No snowdrift 5 cm new snow Some loose snow (1-10cm) Dry

ObsID: 185071

Vest-Telemark / TINN

Snow

08.03.2019 kl. 16:36

1194 masl

Thomas (Unknown)

Image Of Avalanche Observation
Image 1 of 1 Of:  Avalanche Observation Copyright:  Thomas

Avalanche Observation

8. Mar 16:00 Dry slab avalanche 2 - Medium Human triggered SE-facing Rapportert på Facebook, se vedlagt bilde. Usikker på nøyaktig posisjon.

Incident

Snow Backcountry skiing

ObsID: 184992

Vest-Telemark / Raulandsfjell

Snow

08.03.2019 kl. 14:18

1171 masl

svein@obskorps (****)

Image Of Danger Sign
Image 1 of 3 Of:  Danger Sign Copyright: 
Image Of Snow Cover
Image 2 of 3 Of:  Snow Cover Copyright: 
Image Of Weather
Image 3 of 3 Of:  Weather Copyright: 

Weather

No precipitation -4 °C 6 m/s from SW ↗ 10% clouds

Avalanche Danger Assessment

2 Moderate Det er fokksnøen som er problemet i Rauland akkurat nå. Har bare observert ett naturlig utløst skred i dag. Har testet fokksnøen i sørøstheng i dag og den virker rimelig stabil. Men vær likevel obs i bratte sørøstlige heng. Vinden skal løye,så fokksnøen vil gradvis stabilisere seg.

Snow Cover

70 cm in total Some snow drift 5 cm new snow Wind slab (hard slab) Dry Det har kommet ca 25cm med snø de siste dagene. Idag har det vært vind ifra nordvest som har skapt fokksnøflak i sørøstlige områder. Snøen har bundet seg bra til underlaget,så det er dårlige bindinger innad i fokksnøen som er problemet.

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter Difficult to trigger 1 - Small E, SE, S above 900 masl

Avalanche Observation

8. Mar 10:20 Dry slab avalanche 1 - Small Naturaly released SE-facing Avalanche release at 1280 masl and ended at 1235 masl Poor bonding between layers in wind deposited snow Steep slope

Danger Sign

Recent snowdrift

ObsID: 185021

Vest-Telemark / VINJE

Snow

08.03.2019 kl. 14:04

1150 masl

håkon@obskorps (***)

Image Of Danger Sign
Image 1 of 3 Of:  Danger Sign Copyright:  håkon@obskorps
Image Of Weather
Image 2 of 3 Of:  Weather Copyright:  håkon@obskorps Comment:  Viser skydekket og sbødekket sørover.
Image Of Snow Cover
Image 3 of 3 Of:  Snow Cover Copyright:  håkon@obskorps Comment:  Viser vindpåvirknig av snødekket

Weather

No precipitation -5 °C 10 m/s from W → 70% clouds Vinden vekser mellom 2-10ms. Er også noen snøbyger

Avalanche Danger Assessment

3 Considerable Nysnøen er vindpåvirket med dårlig binding i fokksnøen. Forventes å holde seg på nåværende nivå. Forecast too low

Snow Cover

140 cm in total Moderate snow drift 40 cm new snow Storm slab (soft slab) Dry

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter The weak layer collapses easily and clean (easy propagation). Easy to trigger Likely 3 - Large Specific steep slopes NE, E, SE, S above 0 masl

Tests

CTV@20cmQ2 Poor Løsnet lett dårlig binding i fokksnøen

Danger Sign

Recent snowdrift Område: Generelt på fjellet. Beskrivelse:

Avalanche Activity

8. Mar. During the day No avalanche activity Begrenset sikt

ObsID: 184972

Vest-Telemark / BYKLE

Snow

08.03.2019 kl. 13:13

1087 masl

Elisabet@obskorps (***)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright:  Elisabet@obskorps Comment:  Nedføyka nysnølag
ObsID: 184928

Vest-Telemark / BYKLE

Snow

08.03.2019 kl. 12:56

1142 masl

Elisabet@obskorps (***)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright:  Mats Dreng Comment:  Han melder at han kastet et par spader med snø ned, og poff !så løsnet det.

Danger Sign

Recent avalanches Det meldes fra skisenterpersonel om at det løser lett ut i sør og østvendte heng i dag.

ObsID: 184926

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.