Avalanche forecast for Tromsø Saturday 2019-03-16

3
Considerable
Published:

There is a persistent weak layer buried in the snow cover that may be triggered by a skier or snowmobile. Remote triggering possible on hotspots or on convex terrain where the snow cover is thin.

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
Low additional load
Specific steep slopes
Possible

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.
2 - Medium
Low additional load
Specific steep slopes
Possible

What are avalanche problems?

Observations the last 3 days (map placed)

6 mm precipitation.
Fresh breeze from west.
-12 °C to -4 °C at 700 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no
4 mm precipitation.
Breeze from northeast.
-11 °C to -4 °C at 700 m a.s.l.
Partly cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Tromsø / TROMSØ

Snow

16.03.2019 kl. 14:05

76 masl

anitaaw@met (*****)

Snow Cover

Moderate snow drift Storm slab (soft slab) Dry

Danger Sign

Whumpf sound Område: På dette stedet. Beskrivelse: Omfattende drønn i skogen, under 100 MOH .

ObsID: 186562

Tromsø / TROMSØ

Snow

16.03.2019 kl. 13:10

598 masl

timdassler@regobsTroms (Unknown)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright:  timdassler@regobsTroms

Danger Sign

Recent cracks Område: På dette stedet. Beskrivelse:

ObsID: 186597

Tromsø / Skittentind

Snow

16.03.2019 kl. 13:00

744 masl

adadranger (Unknown)

Avalanche Observation

16. Mar 12:30 Cornice fall 2 - Medium Naturaly released E-facing Avalanche ended at 981 masl Poor bonding between layers in wind deposited snow 20 cm high and 30 m wide fracture Steep slope Ingen spor ut eller inn. Virke som det var det øverste laget med fokksnø/nysnø som utgjør skredet. Tydelig brudkant langs steinberget under skavlen på kanskje 30 meter. Liten til middels størrelse. Fikk ikke tatt bra bilde på grunn av flatt lys

ObsID: 186595

Tromsø / TROMSØ

Snow

16.03.2019 kl. 12:59

273 masl

ToreV@met (*****)

Image Of Danger Sign
Image 1 of 1 Of:  Danger Sign Copyright:  ToreV@met Comment:  Drønn i snøen her. Ingen spor fra tidligere i dag. Men et gammelt spor fra tidligere i uka.

Danger Sign

Whumpf sound Område: På dette stedet. Beskrivelse: Tydelig drønn i snøen som spredte seg et godt stykke bortover.

ObsID: 186545

Tromsø / Hollenderen/Tromsø

Snow

16.03.2019 kl. 12:50

760 masl

jegu@NVE (*****)

Avalanche Observation

16. Mar 12:45 Dry slab avalanche 3 - Large Human triggered NW-facing 50 m wide fracture Et turfølge på 5 er involvert i hendelsen, det meldes foreløpig kun om benskade. Kjenner ikke skredstørrelse, men vil anta et sted mellom str 2 og 3. Se link https://www.nordlys.no/snoskred/snoskredfare/kvaloya/fem-tatt-av-snoskred-pa-hollenderen/s/5-34-1082932

ObsID: 186567

Tromsø / TROMSØ

Snow

16.03.2019 kl. 12:35

704 masl

gjranhansen (Unknown)

Image Of Avalanche Activity
Image 1 of 1 Of:  Avalanche Activity Copyright:  gjranhansen

Avalanche Activity

16. Mar. During the day Dry slab avalanche Few (2-5). 1 - Small. Spontaneous release E

ObsID: 186539

Tromsø / TROMSØ

Snow

16.03.2019 kl. 12:04

426 masl

timdassler@regobsTroms (Unknown)

Image Of Notes
Image 1 of 1 Of:  Notes Copyright:  timdassler@regobsTroms

Notes

Hard og vindpakja snø, noen lommer med myk bunden vindtransportert snø

ObsID: 186534

Tromsø / TROMSØ

Snow

16.03.2019 kl. 12:01

383 masl

gjranhansen (Unknown)

Snow Cover

Heavy snow drift 20 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl Dry

Weather

Snow 12 m/s from W → 100% clouds

ObsID: 186533

Tromsø / Storesteinnestinden

Snow

16.03.2019 kl. 11:29

660 masl

Eivind (Unknown)

Coloumn Test

ECTN30Q3 Good ECT gjort i bunnen av bolla sør for SST. Ca 20cm nysnø i bolla. Løste ikke ut på 30 slag. Lempet blokka ut med spade bakfra. Den gikk da på et q3 lag. Vil anslå ca 70cm ned i snødekket. På vei ned hadde snøen begynt å pakke seg rundt kulformasjoner. Forholdene vil trolig endres raskt mtp at det var mye vind i området.

ObsID: 186566

Tromsø / D1905(55340) Tromsø 2016-2021

Snow

16.03.2019 kl. 09:20

124 masl

drift@svv (**)

Weather

Snow 0 °C Sjursnes (0moh) kl 09:20 2 cm nysnø akkumulert siste 12 timer.

Danger Sign

No signs observed

ObsID: 186486

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.