Lawinenlagebericht

Lizard-Flathead

Feb 10 – 11, 2023Avalanche Canada
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Archiviert · abgelaufen 4 years ago

Lawinengefahr

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

New snow falling earlier this week combined with wind will continue to promote wind slab formation.

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Possible - Likely
    Größe
    1–2

    10 to 20 cm of recent snow coupled with southwest wind will continue to build wind slabs in lee terrain features.

  • Deep Persistent Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely
    Größe
    2.5–3.5

    A layer of faceted grains near the base of the snowpack remains on the radar for areas of this region where the snowpack is shallow and where a hard melt-freeze crust formed around Christmas doesn't exist. Deep persistent slab avalanches have not been reported in the region for some time, however, the weak snowpack structure in these shallow areas may still be triggered with a heavy load.

Confidence

Moderate

Avalanche Summary

On Wednesday there was a report of a size 2 natural windslab avalanche on a west aspect at 1800m east of Elkford. It is outlined in this MIN report here.

Please continue to share any observations or photos on the Mountain Information Network.

Snowpack Summary

There is 10-20cm of new snow from early this week, which is being redistributed into lee terrain in wind exposed areas at upper elevations. This overlies previous wind slabs, or a melt-freeze crust below 1900 m.

Deeply buried weak layers formed early season are slowly gaining strength but are still a concern, especially in steep rocky terrain features where the snowpack is thin.

Weather Summary

Thursday Night

Clear periods. Moderate southwest ridgetop wind. Treeline temperature around -6 °C.

Friday

Mainly cloudy with scattered flurries, accumulation 3-5cm. Moderate to strong southwest ridgetop wind. Treeline temperature around -4 ºC. Freezing level rising to 1300m.

Saturday

Mainly cloudy with sunny breaks. Light to moderate southwest ridgetop wind. Treeline temperature around -5 ºC. Freezing level rising to 1200m.

Sunday

Mostly cloudy. moderate west and southwest ridgetop wind. Treeline temperature around -3 °C. Freezing level around 1500m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Avoid thin areas like rock outcroppings where you're most likely to trigger avalanches failing on deep weak layers.

Abgedeckte Regionen