Bulletin d’avalanche

Northwest Inland

Feb 1 – 2, 2024Avalanche Canada
Voir sur la carte
Archivé · expiré 3 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Start on small slopes, and check for signs of instability before committing to steep or high-consequence terrain.

Riding conditions and avalanche problems will change with elevation.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    In areas where wind has formed dense pockets of snow below ridge crests, rolls, and in cross-loaded gullies, human-triggered avalanches could be possible. At treeline, this problem is isolated to steep, rocky, alpine-like features.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–1.5

    Use caution when encountering moist or wet snow in steep areas or gullies.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported on Wednesday before 4 pm.

On Sunday and Monday, numerous small to large (up to size 2) naturally triggered avalanches were reported across the forecast area in steep, north and east-facing alpine terrain.

Snowpack Summary

Expect to find 5-10 cm of soft, dry snow on the surface in sheltered areas of the alpine, shallower and more moist at treeline. A thin frozen crust exists near the surface. Moderate to strong wind has formed reactive wind slabs on north through east-facing terrain, and exposed the crust on windward terrain.

At around 1000 m and below, the snowpack is shallower (around 50 cm) and likely isothermal. If you stand in it, your foot sinks right to the ground.

A variety of previously concerning weak layers buried from early to mid-January can be found 30 - 80 cm below the snow surface. As the temperature cools after warm temperatures and rain, these layers appear to be strengthening.

Weather Summary

Wednesday Night

Cloudy. 2-5 cm of snow expected above 1000 m. Moderate southwest ridgetop wind. Treeline low around -1 °C.

Thursday

Cloudy. Very light rain expected, snow above 1500 m. Moderate ridgetop wind, shifting from SW to SE. Treeline temperature around 0 °C.

Friday

Mostly cloudy. Very light rain and snow expected as freezing level drops to valley bottom. Strong southwest ridgetop wind. Treeline low around -7 °C.

Saturday

Partly cloudy. No new snow expected. Light to moderate northwest ridgetop wind. Treeline temperature around -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Make observations and assess conditions continually as you travel.
  • The more the snow feels like a slurpy, the more likely loose wet avalanches will become.

Régions couvertes