Avalanche forecast for Nordenskiöld Land Saturday 2019-05-18

2
Moderate
Published:

Be careful in leeward slopes, wind deposited snow are covering persistent week layer. Beware of alarm signals like shooting cracks and collapsing snow.

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
Low additional load
Specific steep slopes
Possible

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.
2 - Medium
High additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

0 mm precipitation.
Breeze from north.
-6 °C to -2 °C at 700 m a.s.l.
Plus degrees up to 100 m a.s.l. during the afternoon.
Clear skies.

For updated info, please visit yr.no
0 mm precipitation.
Breeze from northwest.
-5 °C to -1 °C at 700 m a.s.l.
Plus degrees up to 100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Nordenskiöld Land / SVALBARD

Snow

18.05.2019 kl. 18:10

114 masl

Martini@unis (****)

Image Of Snow Cover
Image 1 of 3 Of:  Snow Cover Copyright:  Martini@unis Comment:  Mot vest, Adventdalen mot Adventfjorden
Image Of Snow Cover
Image 2 of 3 Of:  Snow Cover Copyright:  Martini@unis Comment:  Adventdalen med operafjellet
Image Of Snow Cover
Image 3 of 3 Of:  Snow Cover Copyright:  Martini@unis Comment:  Bolternosa ytterst i Todalen

Snow Cover

Smeltet en del snø nede i dalene pga plussgrader de siste dagene. Fuktig og våt snø opp til 500 moh på scooter tur via Todalen til Frithamn. På Frithamn 450 moh så har det tidligere i uka kommet noe nysnø, ser ut til at vinden har tatt godt der oppe da det er mye skravler og små fonner nede i dalen og opp i sidene. Snødekket på Frithamn er fuktig, ikke løs snø tilgjengelig for vindtransport.

ObsID: 194978

Nordenskiöld Land / SVALBARD

Snow

18.05.2019 kl. 14:35

539 masl

Sigmund@obskorps (****)

Image Of Snow Profile
Image 1 of 2 Of:  Snow Profile Copyright: 
Image Of Avalanche Danger Assessment
Image 2 of 2 Of:  Avalanche Danger Assessment Copyright:  Comment:  Snøprofilen etter ECT, og det øverste laget med innblåst snø var tatt vekk

Snow Cover

120 cm in total No snowdrift 0 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl. Layered snow begins at 200 masl Storm slab (soft slab) Overskya og relativt mildt i dag og natt. Snødekket er fuktig og der etter kramt opp til 500 moh. Snø og vind siste uka fra varierende retninger preger snødekket. Mellom fokksnølagene er det et velutviklet lag med nedføyka kantkorn. På rygger og losider kommer vi ned på skarelag. Lite solsmelting de siste dagene pga overskya vær. Men snødekket smelter gradvis mer og mer under 300-400 moh. Fortsatt store toppskavler.

Weather

1 °C

Danger Sign

No signs observed

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow near surface Within half a meter The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. The overlying slab is soft. A big and identifiable crystal in the weak layer. Easy to trigger 2 - Medium N, NE, E, SE, S, SW, W, NW above 400 masl Laget bryter svært lett ved ECT. Men får ingen faretegn fra laget på vei opp til Trollsteinen. Setter derfor skred størrelse 2 og lett og løse ut.

Tests

ECTPV@16cmQ1 Poor blokka gikk ved isolering bak

Avalanche Danger Assessment

2 Moderate Kantkornproblem høyt i snødekket er forstatt bra liv i. Dette er klart et skredproblem som en enkelt skiløper kan påvirke, og som skiløpere og skuterførere må forsøke håndetere ved enten å velge terreng slakere enn 30 grader eller sider som ikke har samlet fokksnø. sola er varslet og vi kan få en god oppvarming av solvendte sider. Toppskavler henger fortsatt og venter på nok oppvarming. Forecast correct Ser fint ut

Snow Profile

7 stratigraphy layers observed 6 temperature points observed 1 Tests connected to snow profile

Avalanche Activity

18. May. During the day No avalanche activity

ObsID: 194976

Nordenskiöld Land / SVALBARD

Snow

16.05.2019 kl. 22:01

629 masl

Audun@unis (***)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright:  Audun@unis

Danger Sign

Whumpf sound Område: I denne fjellsiden. Beskrivelse: Kollapsen skjer under et 13cm lag 1f hard fokksnø flak på et kantkornlag. Dette liker over et 1f fokksnølak på 10cm.

ObsID: 194836

Nordenskiöld Land / SVALBARD

Snow

16.05.2019 kl. 20:39

434 masl

egilg (Unknown)

Image Of Avalanche Observation
Image 1 of 2 Of:  Avalanche Observation Copyright:  egilg
Image Of Avalanche Observation
Image 2 of 2 Of:  Avalanche Observation Copyright:  egilg

Avalanche Observation

16. May 15:41 Dry slab avalanche 2 - Medium Human triggered Buried weak layer of faceted snow near surface 30 cm high and 25 m wide fracture Lee side

Incident

Snow Did not affect anything Backcountry skiing

ObsID: 194911

Nordenskiöld Land / Longyeardalen

Snow

16.05.2019 kl. 13:09

50 masl

Audun@unis (***)

Image Of Snow Cover
Image 1 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 2 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 3 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 4 of 17 Of:  Snow Cover Copyright:  Comment:  Haugen
Image Of Snow Cover
Image 5 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 6 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 7 of 17 Of:  Snow Cover Copyright:  Comment:  lia 1
Image Of Snow Cover
Image 8 of 17 Of:  Snow Cover Copyright:  Comment:  Lia 3
Image Of Snow Cover
Image 9 of 17 Of:  Snow Cover Copyright:  Comment:  Sukkertoppen
Image Of Snow Cover
Image 10 of 17 Of:  Snow Cover Copyright:  Comment:  Lia 4
Image Of Snow Cover
Image 11 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 12 of 17 Of:  Snow Cover Copyright: 
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Image 13 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 14 of 17 Of:  Snow Cover Copyright: 
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Image 15 of 17 Of:  Snow Cover Copyright: 
Image Of Snow Cover
Image 16 of 17 Of:  Snow Cover Copyright:  Comment:  Platået 6
Image Of Snow Cover
Image 17 of 17 Of:  Snow Cover Copyright:  Comment:  Platået 7

Snow Cover

Bilde av snødekke i longyeardalen : Haugen/ Gruvefjellet

ObsID: 194823

Nordenskiöld Land / SVALBARD

Snow

16.05.2019 kl. 12:12

214 masl

Kjetil@obskorps (****)

Image Of Avalanche Activity
Image 1 of 1 Of:  Avalanche Activity Copyright:  Kjetil@obskorps Comment:  To strl 1-2 skred ved svalsatveien. Gått ila natta
ObsID: 194809

Nordenskiöld Land / Svalsatveien, Longyearbyen, Svalbard

Snow

16.05.2019 kl. 10:00

83 masl

elke@unis (***)

Image Of Snow Profile
Image 1 of 2 Of:  Snow Profile Copyright: 
Image Of Avalanche Activity
Image 2 of 2 Of:  Avalanche Activity Copyright:  Comment:  Skredene som har gått siden sist observasjon av Kjetil i går i skålen øst for Svalsatveien. Skredet som gikk over veien har allerede blitt blåst igjen og er vanskelig å se.

Weather

No precipitation -2.3 °C 4 m/s from SW ↗

Avalanche Problems

Dry slab avalanche Buried weak layer of new snow Within half a meter The overlying slab is soft. Easy to trigger 2 - Medium N, NE Lett å påvirke det svake laget, men ingen tegn til bruddforplantning. Skred vil ikke bli større enn str. 2. Med varslet vær og temperatur bør dette stabilisere seg ganske fort.

Snow Profile

3 stratigraphy layers observed 3 temperature points observed 1 Tests connected to snow profile

Avalanche Activity

Several (6-10). 1 - Small. Spontaneous release N, NE flere flakskred str.1-2 samt noen str. 1 løssnøskred i begge skåler på vei mot Svalsat (skålen ovenfor Skytegropa og skålen øst før Skjæringa) kun den ferske fokksnøen som er gått, de har ikke løst ut noe i det gamle snødekket under

Tests

ECTN6@5cmQ3 Medium

ObsID: 194782

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.