Avalanche forecast for Vest-Finnmark Saturday 2021-01-16

Highest danger level per day:
2
Moderate
Published:

Be careful in areas with newly deposited wind slabs. The wind slabs can be overlying a persistent weak layer, and avalanches can therefor be easier to trigger and get bigger than if persistent weak layers were absent.

Illustrasjon av ferdselsråd Avoid terrain steeper than 30 degrees and runout zones where the avalanche problem is present. Remote triggering is possible.
Illustrasjon av ferdselsråd NB: Identifying the avalanche problem is very difficult.
Illustrasjon av ferdselsråd Avoid terrain traps.

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow beneath a crust

Read more about the avalanche problem
2 - Medium
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

5 mm precipitation.
Fresh breeze from northwest.
-7 °C to -2 °C at 1100 m a.s.l.
Plus degrees up to 300 m a.s.l.
Cloudy.

For updated info, please visit yr.no
4 mm precipitation.
Strong breeze from northwest., change to breeze from the northwest during the evening.
-7 °C to -2 °C at 1100 m a.s.l.
Plus degrees up to 300 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Vest-Finnmark / Alta

Snow

16.01.2021 kl. 12:45

427 masl

Thisis_michel (Unknown)

Image Of Danger Sign
Image 1 of 3 Of:  Danger Sign Copyright:  Thisis_michel Comment:  Fleire skytande sprekker fra 5 til 10 meter lange som vart utløst av oss
Image Of Danger Sign
Image 2 of 3 Of:  Danger Sign Copyright:  Thisis_michel
Image Of Snow Profile
Image 3 of 3 Of:  Snow Profile Copyright: 

Notes

15 cm nede i snøen var det snøen dårlig binda saman. Under ECT vart denne ikkje løst ut.

Avalanche Activity

16. Jan. During the day Dry slab avalanche Several (6-10). 1 - Small. Spontaneous release Specific steep slopes. SE, S. Between 500 masl and 300 masl

Danger Sign

Whumpf sound Area: In this mountain side. Description: Fleire drønn i snøen (15 ila dagen) frå langt nede i skogen til godt oppe på fjellet

Other danger sign (specify) Skytende sprekke

Recent avalanches Area: At this place. Description: I mange av dei S, SE, SV vende sidene hadde fleire små skred blitt naturlig utløyst

Recent avalanches Area: In this mountain side. Description: Bra ladet med snø i sør østlige hen

Weather

Snow -3 °C 2 m/s from NW ↘ 100% clouds

Snow Cover

95 cm in total Heavy snow drift 1 cm new snow Elevation of new snow 70 masl Some loose snow (1-10cm) Wet Lit ny snø på vind transportert snø

Tests

ECTP26@45cmQ1

Snow Profile

15 cm P RG 1 mm W, 40 cm K IF 2 mm M, 4 cm F 3 mm, 15 cm P RG 1 mm W -3 °C @ 27 cm, -3 °C @ 0 cm, -3 °C @ 4 cm, -3 °C @ 80 cm 1 tests connected to snow profile 25-90cm

ObsID: 249504

Vest-Finnmark / Alta

Snow

16.01.2021 kl. 12:12

545 masl

Arne@regobs (***)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  Arne@regobs

Avalanche Danger Assessment

2 Moderate Forecast correct Ingen naturleg utløyste skred observert.

Avalanche Problems

Dry slab avalanche Buried weak layer of faceted snow beneath a crust Within half a meter The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. 2 - Medium N, NE, E, SE, S, SW, W, NW between 600 masl and 200 masl Kantkornlag under smelt-frys-skare, er aktivt p.g.a snøfall siste døgn, og fersk vindtransportert snø frå NV/V. Jamnlege drønn med større og mindre forplantning vart observert frå tregrensa og opp til nærare 600. Eit større drønn på flate med stor forplantning, vart observert av anna turfølge i dag.

Dry slab avalanche Poor bonding between layers in wind deposited snow Within half a meter The overlying slab is soft. 2 - Medium E, SE

Danger Sign

Recent snowdrift Område: I denne fjellsiden. Beskrivelse: Fersk vindtransportert snø, i hovudsak frå V.

Recent cracks Område: I denne fjellsiden. Beskrivelse: Skytande sprekk ca 1 m ut frå skia, i fersk vindtransportert snø frå V. i tregrensa.

Whumpf sound Område: Generelt på fjellet. Beskrivelse: Rundt ti drønn med varierande forplantning, frå rundt 200 moh og oppover.

Weather

Snow -2.5 °C from W → 95% clouds Snøbyger med varierande nedbør og vind, 5-10 m/s

Snow Cover

10 cm new snow Elevation of new snow 200 masl. Snow line at 0 masl Dry Ca 10 cm nysnø over smelt-frys-skarelag. Kantorn under dette øvre skarelaget.

ObsID: 249469

Vest-Finnmark / Alta

Snow

15.01.2021 kl. 11:00

144 masl

Bjørnulf@ObsKorps (****)

Image Of Snow Cover
Image 1 of 1 Of:  Snow Cover Copyright:  Bjørnulf@ObsKorps Comment:  Sørover/oppover Kløfta

Weather

2 °C Noen regndråper innimellom.

Snow Cover

No snowdrift 0 cm new snow Moist Lite snø nede i Kløfta i sørlige del av regionen.

ObsID: 249440

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.

For slope angle maps, download the app Varsom Regobs on App Store | Google Play or see our slope angle map at senorge.no ("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.