Lawinenlagebericht

South Coast

Nov 25, 2017Avalanche Canada
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Archiviert · abgelaufen 9 years ago

Lawinengefahr

Sun
Mon
Hochgebirge
2 · Mässig
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Kernpunkte

Wet, warm weather forecasted for Friday night and into the weekend means the potential for loose, wet avalanches in extreme terrain and pockets of storm slab in areas that receive snow instead or rain.

Lawinenprobleme

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    Be aware that storm slabs may exist in the high alpine. Dial back your terrain selection if you find the snow surface changing from wet snow to new snow as you gain elevation.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–2
    Rain has saturated the upper snowpack and potential for loose wet avalanches exists on steep, unsupported terrain features. Even a small loose wet avalanche can gain enough mass to become a big problem.

Confidence

-

Weather Forecast

The next wave of warm, wet weather is expected to hit the South Coast by Saturday morning.Saturday: Wet snow or rain, accumulation 20-30 mm. Moderate to strong south wind. Alpine temperature 2. Freezing level 1600m.Sunday: Rain, accumulation 30-40 mm. Strong south wind. Alpine temperature 5. Freezing level 2500m.Monday: Flurries, accumulation 10-15 cm. Light to moderate southwest wind. Alpine temperature -1. Freezing level 1000 m.

Avalanche Summary

No recent avalanches have been reported. However, the recent rain-on-snow event is suspected to have caused a natural, loose wet avalanche cycle. Although natural avalanche activity and human triggering potential has decreased with cooler temperatures, ongoing rain will maintain the potential for loose wet avalanches, particularly in steep, unsupported terrain. Storm slab development is also a concern at high alpine elevations where precipitation may fall as snow accompanied with strong winds.

Snowpack Summary

There is little information on snowpack structure at this time, except that recent heavy rainfall has saturated the upper snowpack at all elevations and washed away much of the snow at lower elevations. Snow depth varies from 45 - 130 cm for elevations between 900 - 1200m across the region.

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