Lawinenlagebericht

South Coast

Apr 8 – 9, 2018Avalanche Canada
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Lawinengefahr

Tue
Wed
Hochgebirge
2 · Mässig
Waldgrenze
2 · Mässig
Unterhalb
1 · Gering
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Kernpunkte

Expect changing weather on Monday: light precipitation in the morning, increasing freezing levels, and afternoon sun breaks. These will weaken the snow surface over the day. Observe for signs of instability before travelling into avalanche terrain.

Lawinenprobleme

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    Recent snowfall at higher elevations has formed slabs.Observe for the bond of new snow with the old surface before committing into avalanche terrain.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–2
    Rain in the morning and warming temperatures and sunny patches in the afternoon could rapidly weaken the snow surface. Watch out for terrain traps such as gullies or above cliffs, where small avalanches can build and have severe consequences.

Confidence

Moderate -

Weather Forecast

MONDAY: Mostly cloudy with light precipitation in the morning and afternoon clearing, light southerly winds, treeline temperature 1 C, freezing level 1500 m rising to 2500 m by the late afternoon.TUESDAY: Mostly cloudy with afternoon rain, accumulation 20 mm, strong southerly winds, treeline temperature 4 C, freezing level 2600 m dropping to 1500 m over the day.WEDNESDAY: Mostly cloudy with light precipitation, accumulation 15 mm rain at lower elevations and 15 cm snow at higher elevations, light southerly winds, treeline temperature 0 C, freezing level 1400 m.

Avalanche Summary

We have received very little information on avalanche activity for this region. From the little we have heard, it was generally easy to initiate large wet loose avalanche in steep terrain below treeline on the weekend. We would very much appreciate it if you spend a moment to submit any observations you have to the Mountain Information Network here, even if it is just a photo. Thanks!

Snowpack Summary

Around 40 to 100 mm of rain fell on the snowpack up to around treeline between Thursday and Sunday, with precipitation as snow at alpine elevations and possible at treeline too. In higher terrain, snowfall has created new storm slabs. This snow overlies a thick crust in most areas except for possibly shady aspects in alpine terrain. The snowpack below the crust is generally strong.Below treeline and possibly treeline elevations, a spring snowpack exists. The rain saturated and weakened the upper snowpack. The wet snow may freeze at higher elevations with cool temperatures. The mid and lower snowpack are strong.

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