Avalanche forecast for Tromsø Tuesday 2019-03-26

3
Considerable
Published:

Avoid areas with wind-deposited snow. It is also possible to trigger avalanches in a persistant weak layer in old snow, typically found in bowls and gullies where the snow cover is thin.

New snow (slab avalanches)

Buried weak layer of new snow

Avoid terrain traps and steep slopes until the new snow has stabilized. The avalanche problem is generally widely distributed on any steep slope with deep new snow. Look for cohesive new snow that breaks apart or is poorly bonded to the old snow. Cracks around your skis are a typical dangersign.
3 - Large
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)

2 mm precipitation.
Fresh breeze from northwest., change to breeze from the southwest during renoon.
-10 °C to -4 °C at 700 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
8 mm precipitation, up to 15 mm in the most exposed areas.
Fresh breeze from northwest.
-9 °C to -3 °C at 700 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Tromsø / TROMSØ

Snow

25.03.2019 kl. 13:58

404 masl

Eirik Fjær (Unknown)

Tests

ECTP30@80cmQ2 Good

ECTN13@35cmQ2 Good

Danger Sign

Large snowfall Område: Generelt på fjellet. Beskrivelse:

Snow Cover

300 cm in total Some snow drift 20 cm new snow Much loose snow (10-30cm) Dry

ObsID: 188114

Tromsø / D1905(55340) Tromsø 2016-2021

Snow

25.03.2019 kl. 08:56

11 masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv863 Glimbukta - ,

Danger Sign

Quick temperature change

Weather

Snow -1 °C Glimma (0moh) kl 08:56 92 cm nysnø akkumulert siste 3 timer.

ObsID: 188022

Tromsø / D1905(55340) Tromsø 2016-2021

Snow

25.03.2019 kl. 08:18

124 masl

drift@svv (**)

Danger Sign

No signs observed

Weather

No precipitation 0 °C Sjursnes (0moh) kl 08:18 10 cm nysnø akkumulert siste døgn.

ObsID: 188011

Tromsø / D1905(55340) Tromsø 2016-2021

Snow

25.03.2019 kl. 06:56

30 masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv57 Grøtfjordfjellet - Grøtfjorden,

Weather

Snow -1 °C Grøtfjord (0moh) kl 06:56 3 cm nysnø akkumulert siste 3 timer.

ObsID: 187995

Tromsø / kattfjordeidet opp mot Steinskardtind

Snow

24.03.2019 kl. 13:30

270 masl

Charlotte (Unknown)

Image Of Snow Profile
Image 1 of 2 Of:  Snow Profile Copyright:  Charlotte Comment:  Lille blokktest: Svakt lag @55 cm (2.5 cm tykt, 1 mm kornstørrelse, Q3, høy tilleggsbelastning) og @65 cm (Q2, helt glatt flate, 1mm smelteomvandlet korn)
Image Of Snow Profile
Image 2 of 2 Of:  Snow Profile Copyright: 

Danger Sign

Recent snowdrift Område: Generelt på fjellet. Beskrivelse:

Snow Cover

190 cm in total Moderate snow drift 5 cm new snow Storm slab (soft slab) Stor variasjon av mengde nysnø grunnet snøfokk, på en del steder avblåst ned til skarelag.

Weather

Snow 12 m/s from W → 100% clouds

Snow Profile

7 stratigraphy layers observed Total snødybde 190 cm

ObsID: 187943

Tromsø / TROMSØ

Snow

24.03.2019 kl. 10:41

355 masl

StefanW (Unknown)

Image Of Tests
Image 1 of 1 Of:  Tests Copyright: 

Tests

CTN Good Kantkornlag @ 78cm, Q2. / Ingen kollaps ved CT. / Trengtes stor belastning fra siden til løsne. / Stort sett homogen fokksnø over 2-3 cm tykt kantkornlag. / Fokksnølag (7cm) i ferd å bygges opp på overflaten over tynt skare.

ObsID: 187879

Tromsø / D1905(55340) Tromsø 2016-2021

Snow

24.03.2019 kl. 10:19

30 masl

drift@svv (**)

Weather

Rain 3 °C Grøtfjird (0moh) kl 10:19

ObsID: 187870

Tromsø / D1905(55340) Tromsø 2016-2021

Snow

24.03.2019 kl. 09:14

124 masl

drift@svv (**)

Danger Sign

No signs observed

Weather

No precipitation 3 °C Sjursnes (0moh) kl 09:15

ObsID: 187859

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.