Avalanche forecast for Sunnmøre Wednesday 2019-02-13

3
Considerable
Published:

Temperature rise may give some wet sluffs below approx. 1100 m a.s.l. Moderate gale from SW, and some snow, will form storm slabs at higher altitudes. Persistent week layers of faceted snow in the snow pack may in some cases lead to slab avalanches, caused by snow melt at low altitudes or loading at higher altitudes.

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
Spontaneous release
Some steep slopes
Possible

Wet snow (loose snow avalanches)

Loose snow

Avoid avalanche release and run out areas. Wet snow avalanches tend to release spontaneously. Timing is important. Stability decreases when the snow surface gets wet and soft.
2 - Medium
Spontaneous release
Many steep slopes
Possible

Persistent weak layer (slab avalanches)

Buried weak layer of faceted snow near surface

Keep distance to each other when traveling in avelanche terrain. NB, remote triggering is possible. 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 and cracking which means that you influence weak layers and should avoid avalanche terrain. However, absence of signs does not mean it is safe.
3 - Large
High additional load
Some steep slopes
Possible

What are avalanche problems?

3 mm precipitation.
Moderate gale from west., change to strong breeze from the southwest.
-6 °C to -2 °C at 1400 m a.s.l.
Plus degrees up to 1100 m a.s.l. during the evening.
Cloudy.

For updated info, please visit yr.no
8 mm precipitation.
Fresh breeze from west., change to moderate gale from the southwest during the afternoon.
-10 °C to -2 °C at 1400 m a.s.l.
Plus degrees up to 600 m a.s.l. during the evening.
Cloudy.

For updated info, please visit yr.no

Observations the last 3 days

Rapportert av: drift@svv (**)

i kommune: ØRSTA

Avalanche evaluation

3 Considerable

Avalanche activity

Not given 3 - Large

Loose wet avalanche

Weather

No precipitation

6.0 grader

Dangersign

Quick temperature change

Dangersign

Much water in the snow

regn på snø

Dangersign

Recently made avalanches

Click here for pictures and the full observation

Rapportert av: Runes (Unknown)

i kommune: ØRSTA

Avalanche activity

Numerous (10 or more) 2 - Medium

Not given

Click here for pictures and the full observation

Rapportert av: Bjørnar@Hagefonna (**)

i kommune: ØRSTA

Single avalanche

2 - Medium

Wet slab avalanche

Incident

Did not affect anything

Click here for pictures and the full observation

Rapportert av: drift@svv (**)

i kommune: ØRSTA

Avalanche evaluation

3 Considerable

Avalanche activity

Not given 1 - Small

Wet slab avalanche

Weather

No precipitation

6.0 grader

Dangersign

Quick temperature change

Click here for pictures and the full observation

Rapportert av: Eltervaag (Unknown)

i kommune: VOLDA

Coloumn test

Medium

ECTN15@55cmQ3

Coloumn test

Good

ECTN26@80cmQ2

Snow cover

Weather

Not observed

3.0 grader

Rapportert av: drift@svv (**)

i kommune: ØRSTA

Avalanche evaluation

1 Low

Avalanche activity

No avalanche activity Not given

Not given

Weather

No precipitation

7.0 grader

Dangersign

Recent snowdrift

Dangersign

Quick temperature change

Dangersign

Much water in the snow

regn på snø

Click here for pictures and the full observation

Rapportert av: Bjørnar@Hagefonna (**)

i kommune: ØRSTA

Avalanche activity

Several (6-10) 2 - Medium

Loose wet avalanche

Click here for pictures and the full observation

Rapportert av: Christer@obskorps (*****)

i kommune: ØRSTA

Avalanche activity

Few (2-5) 2 - Medium

Loose wet avalanche

Rapportert av: drift@svv (**)

i kommune: STRANDA

Avalanche activity

Not given 4 - Very large

Dry slab avalanche

Rapportert av: drift@svv (**)

i kommune: NORDDAL

Avalanche evaluation

3 Considerable

Dangersign

Large snowfall

Dangersign

Recent snowdrift

Dangersign

Quick temperature change

Dangersign

Much water in the snow

regn på snø

Dangersign

Recently made avalanches

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.