Lawinenlagebericht

Sea To Sky

Mar 24 – 25, 2016Avalanche Canada
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Archiviert · abgelaufen 11 years ago

Lawinengefahr

Sat
Sun
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
2 · Mässig
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Kernpunkte

Storm slabs are expected to remain a problem above treeline Friday. A rising freezing level combined with the strong kiss of the spring sun is expected to initiate a round of loose wet activity too. Stay alert to changing conditions!

Lawinenprobleme

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–5
    Some cornices are the size of a bus. Give these monsters a wide berth when traveling on or below ridge crests.

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–4
    10 to 20 cm combined with moderate southwest winds has created storm slabs at and above treeline. These slabs will likely remain sensitive to human triggering Friday. The appearance of the sun Friday may initiate some natural activity too.

  • Loose Wet

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2
    Thursday's storm snow will be exposed to the strong spring sun and a rising freezing level Friday which is expected to initiate a round of loose wet activity at and below treeline. This activity may creep into south facing alpine terrain too.

Confidence

Moderate - Timing, track, or intensity of incoming weather system is uncertain on Sunday

Weather Forecast

The steady progression of ridges and troughs continues. Friday ushers in a brief drying day before another upper trough begins to spread high cloud to the Sea to Sky Saturday giving way to convective flurries on Sunday. FRIDAY: Freezing level around 1500 m, no significant precipitation expected, light northwest wind. SATURDAY: Freezing level around 1500 m, no significant precipitation expected, light southwest wind. SUNDAY: Freezing level around 1200 m, 5 to 15 cm of snow possible, light southwest wind. For more detailed mountain weather information visit avalanche.ca/weather

Avalanche Summary

Reported avalanche activity on Wednesday was limited to very thin & small storm slabs. I suspect that there were some natural storm slab failures on Thursday.

Snowpack Summary

12 to 20 cm of storm snow fell Wednesday night and Thursday accompanied by moderate south/southwest wind which has likely formed storm slabs at and above treeline. Below the new snow the snowpack is strong and well-settled throughout with no notable persistent weaknesses. Cornices are huge and fragile.

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