Bulletin d’avalanche

Lizard-Flathead

Apr 4 – 5, 2022Avalanche Canada
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Archivé · expiré 4 years ago

Danger d’avalanche

Wed
Thu
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

Continue to make conservative terrain choices. The storm snow likely hasn't bonded to the underlying crust.

Problèmes avalancheux

  • Storm Slabs

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

    New storm and wind slabs will have form throughout the day on Monday. Size and sensitivity to triggering will be greatest near ridge crests and steep roll overs on north and east facing terrain where wind loading is likely to occur.

Confidence

Moderate - The snowpack structure is generally well understood.

Weather Forecast

Monday night: Stormy with 5 to 10 cm expected. Moderate to strong southwest winds and freezing levels falling to 1400 m.

TUESDAY: Mostly cloudy with around 5 cm of new snow expected. Moderate west wind and freezing level around 1600 m.

Wednesday: Sunny with no new snow expected. Light to moderate westerly winds and freezing levels rising to 1900 m.

Thursday: Sunny with no new snow expected. Moderate southwest winds. Freezing level rising to 2100 m.

Avalanche Summary

On Monday ski cutting produced storm slab avalanches up to size 1.5 in the alpine and treeline. Several size 1.5 natural storm slab and dry loose avalanches were also observed.

Snowpack Summary

New storm and wind slabs will have form throughout the day on Monday. Below this a crust exists on all aspects to around 2500 m and likely to mountain top on sun affected slopes. This crust will likely be found near the surface at low elevations and become moist as the freezing level rises. 

 The mid and lower snowpack are generally strong and well bonded.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Closely monitor how the new snow is bonding to the crust.

Régions couvertes