Avalanche forecast for Sør-Troms Tuesday 2019-03-26

3
Considerable
Published:

The snowpack is unstable. Avoid areas with wind-deposited snow. It is also possible that wind slab avalanches trigger avalanches in a persistant weak layer in the old 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.
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)

1 mm precipitation.
Fresh breeze from northwest., change to breeze from the south 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

Sør-Troms / D1909(55220) Hinnøy 2015-2020

Snow

25.03.2019 kl. 14:01

masl

drift@svv (**)

Danger Sign

No signs observed

ObsID: 188113

Sør-Troms / D1816(55220) Ofoten 2018-2023

Snow

25.03.2019 kl. 08:12

106 masl

drift@svv (**)

Avalanche Activity

25. Mar 08:15 - 24. Mar 08:15 Loose dry avalanche 1 - Small. Spontaneous release Between 500 masl and 400 masl Gjelder Fv84 Sneveien - Sennemyra, Flere småskred rundt om kring. Ingen ned til veibane

ObsID: 188008

Sør-Troms / D1816(55220) Ofoten 2018-2023

Snow

25.03.2019 kl. 08:12

42 masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv141 Marines - Svarthammeren,

ObsID: 188009

Sør-Troms / D1903(55340) Senja 2014 - 2019

Snow

25.03.2019 kl. 07:00

141 masl

drift@svv (**)

Image Of Not given
Image 1 of 1 Of:  Not given Copyright:  Statens vegvesen Comment:  Bilde fra kontraktsområdet

Danger Sign

Large snowfall

Weather

Snow -3 °C Bergsboten (0moh) kl 06:19 15 cm nysnø akkumulert siste 12 timer.

Avalanche Danger Assessment

3 Considerable Betydelig skredfare (vurdert fra veg). Endel vind i helga, ca 15cm nysnø i natt.. Minkende skredfare neste døgn: Noe snø utover dagen så blir det litt kaldere og ingen nedbør..

ObsID: 187998

Sør-Troms / D1909(55220) Hinnøy 2015-2020

Snow

24.03.2019 kl. 13:51

masl

drift@svv (**)

Danger Sign

No signs observed

ObsID: 187923

Sør-Troms

Snow

24.03.2019 kl. 12:21

453 masl

fred@obskorps (***)

Image Of Danger Sign
Image 1 of 2 Of:  Danger Sign Copyright:  fred@obskorps
Image Of Weather
Image 2 of 2 Of:  Weather Copyright:  fred@obskorps

Danger Sign

Recent snowdrift Område: Generelt på fjellet. Beskrivelse: Sterk vind fra NV har flyttet store mengder snø til SØ

Weather

Sleet 1 °C 14 m/s from NW ↘ 70% clouds Sterk vind fra NV. Det er samtidig kommet mye nedbør snøen blir tør ved 350moh

Snow Cover

150 cm in total Some snow drift 30 cm new snow Elevation of new snow 0 masl. Snow line at 0 masl Much loose snow (10-30cm) Dry Snøen er våt opp til 350moh. Over dette er det tør snø. I nord er det avblåst, snøen er lagt over i Sørlige leområder. Mye snø i sør

ObsID: 187911

Sør-Troms / D1903(55340) Senja 2014 - 2019

Snow

24.03.2019 kl. 10:35

141 masl

drift@svv (**)

Danger Sign

Much water in the snow regn på snø

Recent snowdrift

Avalanche Danger Assessment

3 Considerable Betydelig skredfare (vurdert fra veg). Mildvær, regn og sludd.. Uforandret skredfare neste døgn: Vil trolig stabelisere seg mer..

ObsID: 187876

Sør-Troms / D1816(55220) Ofoten 2018-2023

Snow

24.03.2019 kl. 09:41

masl

drift@svv (**)

Danger Sign

Much water in the snow regn på snø

Quick temperature change

Large snowfall

Weather

Sleet 3 °C Fornes (0moh) kl 09:41 20 cm nysnø akkumulert siste 6 timer.

ObsID: 187864

Sør-Troms / D1816(55220) Ofoten 2018-2023

Snow

24.03.2019 kl. 08:20

106 masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv84 Sneveien - Sennemyra,

ObsID: 187853

Sør-Troms / D1816(55220) Ofoten 2018-2023

Snow

24.03.2019 kl. 08:20

42 masl

drift@svv (**)

Avalanche Activity

No avalanche activity Gjelder Fv141 Marines - Svarthammeren,

ObsID: 187854

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.