Lawinenlagebericht

South Rockies

Mar 7, 2017Avalanche Canada
Auf der Karte ansehen
Archiviert · abgelaufen 10 years ago

Lawinengefahr

Tue
Wed
Hochgebirge
3 · Erheblich
Waldgrenze
2 · Mässig
Unterhalb
2 · Mässig
Vollständige Karte öffnen

Kernpunkte

A week of snowfall and strong winds has left wind slabs and some cornices primed for human triggering. Avoid overhead hazards and evaluate terrain carefully before committing to bigger lines.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    1–2
    Gusty southwest winds at upper elevations have formed fresh wind slabs on leeward slopes and behind terrain features.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible
    Größe
    2–4
    A weak layer near the base of the snowpack has the potential for large avalanches, especially in areas with minimal rider compaction or thin variable snow cover.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

We're looking at occasional (intense) flurries and cool temperatures throughout the forecast period. TUESDAY: Flurries with up to 5cm of new snow, 20-40 km/h southeast winds, alpine temperatures around -11 C. WEDNESDAY: Flurries with 5-10 cm of new snow, 20-30 km/h east winds, alpine temperatures around -12 C. THURSDAY: Cloudy with scattered flurries and up to 3-5 cm of new snow, 30-50 km/h east winds, alpine temperatures around -14 C.

Avalanche Summary

On Saturday, several size 2 natural storm slabs were reported in alpine terrain and explosive control and ski cutting produced size 1-1.5 avalanches at treeline and in the alpine.Natural activity is expected to taper off, but storm and wind slabs will remain susceptible to human triggering.

Snowpack Summary

We've had another 15-25 cm of snow since Saturday, bringing the total from the past week to 50-80 cm. Strong southwesterly winds redistributed the new snow onto leeward slopes, building thicker and stiffer slabs. The new snow will likely have a poor bond to the old snow interface that consists of stiff wind slabs, crusts, and facets. The mid-pack in this region is generally strong, but the bottom third of the snowpack is composed of weak facets (sugary snow crystals). Approximately 100-120 cm of settled snow sits above this weak layer of sugary, rotten facets that developed in December. This remains a concern and should be on your radar, especially with the recent loading from snow and wind.

Abgedeckte Regionen