Avalanche forecast for Vest-Finnmark Saturday 2019-03-16

3
Considerable
Published:

Difficult conditions. There is a persistent weak layer buried in the snow pack, especially around the tree line. Be careful in areas with wind deposited snow.

Wind drifted snow (slab avalanches)

Buried weak layer of new snow

Avoid steep (more than 30 degrees) areas 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
Low additional load
Specific steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow above a crust

Avoid skiing in avalanche terrain (steep terrain more than 30 degrees and in runout zones). NB, remote triggering is likely. 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, cracking and recent avalanches. However, absence of signs does not mean it is safe.
3 - Large
High additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

6 mm precipitation, up to 15 mm in the most exposed areas.
Fresh breeze from southwest., change to fresh breeze from the northwest during the evening.
-12 °C to -6 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
4 mm precipitation.
Fresh breeze from south., change to breeze from the southwest during the evening.
-11 °C to -6 °C at 1100 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Vest-Finnmark / D2007(55440) Hammerfest 2014-2019

Snow

16.03.2019 kl. 11:53

masl

drift@svv (**)

Avalanche Danger Assessment

2 Moderate Moderat skredfare (vurdert fra veg). Sør vestlig opptil liten kuling utsatte steder, enkelte snøbyger. . Uforandret skredfare neste døgn: Dreining til nord østlig, spredte snøbyger. .

ObsID: 186530

Vest-Finnmark / KVÆNANGEN

Snow

16.03.2019 kl. 11:51

442 masl

Arne@regobs (***)

Weather

Snow 8 m/s from W → 70% clouds Bygevêr frå vest, med aukande vindstyrke under bygene. Lett til moderat snøfokk over tregrensa.

Coloumn Test

ECTP14@37cmQ2 Medium Rask ECT vart gjort. Brot med forplantning gjekk på svakt lag av kantkorn over smelt/frys-skarelag. Fokksnø over kantkornlag: 1F med gradvis overgang til 4F oppover i snødekket, og rundt 10 cm fersk nysnø (F) i øverste del.

Avalanche Problems

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter The overlying slab is soft. NE, E, SE above 300 masl

Dry slab avalanche Buried weak layer of faceted snow above a crust Within half a meter The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. N, NE, E, SE, S, SW, W, NW above 200 masl

ObsID: 186528

Vest-Finnmark / D2012(55440) Langfjord 2017-2022

Snow

15.03.2019 kl. 09:02

25 masl

drift@svv (**)

Danger Sign

No signs observed

ObsID: 186398

Vest-Finnmark / D2007(55440) Hammerfest 2014-2019

Snow

14.03.2019 kl. 16:36

3 masl

drift@svv (**)

Avalanche Activity

14. Mar 16:38 - 13. Mar 16:38 Dry slab avalanche 1 - Small. Low additional load N. Between 200 masl and 100 masl Gjelder Fv883 Skillefjordnes - Korsnes, Utløst med Gas-C

ObsID: 186226

Vest-Finnmark / D2007(55440) Hammerfest 2014-2019

Snow

14.03.2019 kl. 16:36

masl

drift@svv (**)

Avalanche Danger Assessment

2 Moderate Moderat skredfare (vurdert fra veg). Fortsatt vind fra sør, men avtagende. Ikke mye transport av snø. . Uforandret skredfare neste døgn: Ventes roligere værforhold neste døgn. .

Danger Sign

Recent snowdrift

ObsID: 186227

Vest-Finnmark / ALTA

Snow

14.03.2019 kl. 13:50

656 masl

Vevo (Unknown)

Avalanche Observation

14. Mar 13:53 Glide avalanche 1 - Small Released by explosives S-facing Bowl Sprengte 3 ladninger, gikk et lite skred som stoppet raskt.

Incident

Snow Did not affect anything

Danger Sign

No signs observed

Weather

No precipitation 20% clouds

Coloumn Test

CTN Good Løsnet ikke med Ct test måtte brekke ut med spade.

ObsID: 186188

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.