Lawinenlagebericht

South Coast Inland

Mar 12 – 13, 2018Avalanche Canada
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Archiviert · abgelaufen 9 years ago

Lawinengefahr

Wed
Thu
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Expect avalanche danger to increase as the temperature rises through the day. Danger ratings are rated for the heat of the day when the likelihood avalanches triggering is highest.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    New snow combined with predominantly southwest winds have created wind slabs in the lee of terrain features.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2
    Sun combined with rising freezing levels will weaken the surface snow on slopes exposed to the sun.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

TUESDAY: mainly cloudy with sunny breaks and wet flurries in the afternoon / Moderate south wind / Alpine temperature 6 / Freezing level 2600m  WEDNESDAY: Mainly cloudy with isolated flurries or rain showers / Light west wind / Alpine temperature -1 / Freezing level 1300m  THURSDAY: Cloudy with scattered flurries / Light west wind / Alpine temperature 0 / Freezing level 1600m 

Avalanche Summary

Reports from Sunday show primarily solar induced avalanches size 1.5-2 on south and west facing sun exposed slopes during the heat of the day. On Saturday a skier triggered size 2 wind slab avalanche was reported from the north of the region on a northeast aspect in the alpine. There was also a report of natural size 2 wind slab avalanche on a northwest aspect in the alpine. Avalanche activity on Friday was reported as either loose dry to size 1 or wind slab activity to size 1-1.5 on northerly aspects at tree line.

Snowpack Summary

Recent new snow has been redistributed by southerly winds at upper elevations and has now been affected by above freezing temperatures except for high (above 1800m) northerly facing slopes. The new snow sits on a sun crust on steep south-facing slopes, cold dry snow and possibly small surface hoar on shady aspects.In northern parts of the region a weak layer buried mid-February is about 40-50 cm below the surface and has been reactive in some snowpack tests. The layer is composed of sugary facets, a sun crust on solar aspects, and surface hoar that is present at and below treeline. The snowpack is well settled in southern parts of the region i.e.Coquihalla and Manning Park.Variable winds in the past month have created cornices on many alpine ridgelines. They become touchier as they grow in size, as temperatures rise, and as the strong late-winter sun shines down upon them on clear days.

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