Avalanche forecast for Hallingdal Wednesday 2021-02-24

Highest danger level per day:
3
Considerable
Published:

General unstable conditions. Wet avalanches are expected. In the mountains where precipitation falls as snow, avoid new and fresh stormslabs.

Illustrasjon av ferdselsråd Wet surface: Avoid terrain steeper than 30 degrees. Avoid also runout zones.
Illustrasjon av ferdselsråd Dry surface: Avoid terrain steeper than 30 degrees and runout zones. Remote triggering is likely.
Illustrasjon av ferdselsråd Avoid terrain traps.

Wet snow (slab avalanches)

Buried weak layer of faceted snow near surface

Read more about the avalanche problem
3 - Large
Spontaneous release
Specific steep slopes
Likely

Persistent weak layer (slab avalanches)

Buried weak layer of surface hoar

Read more about the avalanche problem
3 - Large
Spontaneous release
Specific steep slopes
Likely

What are avalanche problems?

Observations the last 3 days (map placed)

1 mm precipitation.
Breeze from southwest., change to strong breeze from the south during the evening.
-5 °C to -1 °C at 1400 m a.s.l.
Plus degrees up to 1000 m a.s.l. during the evening.
Partly cloudy.

For updated info, please visit yr.no
7 mm precipitation, up to 20 mm in the most exposed areas.
Moderate gale from southwest., change to fresh breeze from the southwest during the evening.
-1 °C to 3 °C at 1400 m a.s.l.
Plus degrees up to 1600 m a.s.l. during renoon.
Cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Hallingdal / Sudndalsfjorden

Snow

24.02.2021 kl. 14:47

744 masl

drift@svv (**)

Avalanche Observation

24. Feb 14:47 Snø på FV50 løsnet fra fjell/dalside 50-200m. Anslått skredvolum på veg: <10m^3.Blokkert veglengde: <10m.

Incident

Snow Traffic stopped Road

ObsID: 257677

Hallingdal / Ål

Snow

23.02.2021 kl. 15:11

931 masl

heidi@nve.no (*****)

Image Of Tests
Image 1 of 4 Of:  Tests Copyright:  heidi@nve.no Comment:  Brudd rundt skarelag/overgangen RG/FC. Ser ut som om litt av fuktigheten har stoppet her.
Image Of Tests
Image 2 of 4 Of:  Tests Copyright:  heidi@nve.no Comment:  Laget som går til brudd.
Image Of Snow Profile
Image 3 of 4 Of:  Snow Profile Copyright:  heidi@nve.no
Image Of Snow Profile
Image 4 of 4 Of:  Snow Profile Copyright: 

Snow Cover

No snowdrift Crust Ikke bærende skare i overflaten, både her i skogen og opp mot 1000-1100 moh.

Weather

No precipitation 4-7 minus om natten, plussgrader om dagen de siste dagene. Vindstille i dag, selv på fjellet.

Tests

LBT Kollapset ganske fort i et litt våtere lag (se bilde). Men her i skogen er snøen ubunden, så det blir ikke noe brudd / flak som kan tas av for å se bruddkant.

Snow Profile

3 cm K MFcr, 4 cm F DF M, 7 cm 4F DF M, 1 cm K MFcr, 14 cm F RG M, 1 cm K MFcr, 14 cm F FC 1 mm M, 24 cm F FC 2 mm M

ObsID: 257457

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.