Lawinenlagebericht

South Rockies

Feb 17 – 18, 2015Avalanche Canada
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Archiviert · abgelaufen 12 years ago

Lawinengefahr

Thu
Fri
Hochgebirge
2 · Mässig
Waldgrenze
1 · Gering
Unterhalb
1 · Gering
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Kernpunkte

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Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–4
    Hard wind slabs may be lurking below ridge crests and in exposed gullies. These locally deep deposits can fracture over surprising distances above trigger points and into low-angled terrain, often catching people by surprise.

  • Cornices

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    1–3
    Not only a hazards in themselves, cornice falls can also act as heavy triggers for persistent slab avalanches on the the slope below.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    3–5
    Although unlikely, these highly destructive avalanches remain possible with heavy impacts (e.g. cornice falls and surface avalanche stepping down) in the right spot (e.g. thin rocky areas). Daytime warming will also increase sensitivity.

Confidence

Good

Weather Forecast

Mainly sunny and dry for Wednesday with some cloud cover and possible flurries expected for Thursday and especially Friday. Above freezing alpine temperatures are expected on Wednesday; however, freezing levels should drop back down to 1700 m for Thursday and 1500 m Friday, and valley bottoms overnight throughout the forecast period. Light southwesterly winds are expected to pick up to moderate throughout the day on Wednesday, before decreasing to light on Thursday and shifting to northwesterlies on Friday.

Avalanche Summary

No new avalanches reported.

Snowpack Summary

A thick supportive crust has frozen on the surface at lower elevations, with a trace amount of fresh snow on top in some places. Two weak crusts in the snowpack remain a concern for persistent slabs and step-down avalanches. One buried mid-January was recently found down 70 cm and and the other buried mid-December was found down 135 cm at treeline where the total depth was 200 cm.

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