Lawinenlagebericht

Banff Yoho Kootenay

Mar 9 – 10, 2024Avalanche Canada
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Lawinengefahr

Mon
Tue
Hochgebirge
3 · Erheblich
Waldgrenze
3 · Erheblich
Unterhalb
3 · Erheblich
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Kernpunkte

Saturday will be the warmest day since the storm ended. Keep this in mind when choosing terrain and the timing of your day. Start early, end early, and limit your exposure. Human triggering of avalanches is likely and natural avalanches are possible.

This is a time when practicing patience goes a long way to a safe and enjoyable day.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    1–2.5

    Recent storm snow has been redistributed into lee areas by moderate to strong winds.

  • Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Likely
    Größe
    2–3.5

    40-80 cm of soft slab overlies the Feb 3 interface. Recently, many natural, human, and explosive-triggered avalanches have occurred on this layer.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    2–3.5

    Some recent avalanches are stepping down to the weak basal facet and depth hoar layers near the ground resulting in large avalanches. This seems to be most common in thin, steep, rocky terrain in the alpine.

Confidence

Moderate

Avalanche Summary

Helicopter bombing today (March 7th) produced numerous avalanches up to size 3 on Mt. Hector. Natural activity has tapered, but we are still seeing evidence of the widespread cycle that occurred after our most recent storm. Natural activity is still possible.

Snowpack Summary

Thin crusts are forming on solar aspects, as high as treeline. 40-80 cm of snow fell from Feb 23 to March 2. This snow continues to settle into soft slabs and has been blown into wind slabs at upper elevations. These slabs overlie the weak Feb 3 facet/crust layer that is down 40-80 cm and exists up to 2500 m and higher on solar aspects. The lower snowpack consists of several facet layers and depth hoar and is weak in shallow areas.

Weather Summary

Saturday looks to be warm and windy with a chance of snow.

On Saturday, freezing levels are expected to hit 1600-2000m. Winds in the alpine are forecast to be strong/extreme in places (60-80km/h) out of the SW. In the afternoon, areas along the divide may see 2-5cm of snow.

Sunday's temperatures are mild, with more precipitation in the pm (4-8cm) and lighter winds.

For more detailed weather information, click here.

Terrain and Travel Advice

  • Avoid exposure to overhead avalanche terrain as temperatures increase.
  • Remote triggering is a big concern, be aware of the potential for wide propagations and large, destructive avalanches at all elevations.
  • In times of uncertainty conservative terrain choices are our best defense.

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