Bulletin d’avalanche

Waterton Lakes

Mar 19 – 22, 2022
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Archivé · expiré 5 years ago

Danger d’avalanche

Mon
Tue
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Below 2000 m a melt freeze crust of varying thickness will make ski quality variable.

At alpine and treeline windslabs remain possible to human triggering in steep unsupported terrain.

Problèmes avalancheux

  • Wind Slabs

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

    20-50cm windslabs in treeline and alpine lees. Several natural windslab avalanches, size 1-2, were observed Saturday on north and east alpine lees.

Weather Forecast

Sunday: Cloudy with sunny periods isolated flurries, amounting to 5 cm. Moderate gusting strong W winds. Alpine high -8. Freezing levels valley bottom.

Monday: Cloudy with isolated flurries, trace precip. Moderate W winds. Alpine high -6, low -10. FL 1400m.

Tuesday: Cloudy with sunny periods. Moderate SW winds. Alpine high -2, low -5. FL 1700m

Snowpack Summary

Wind slabs 20-60cm deep at alpine and treeline. Below 2000m is a melt freeze crust of varying thickness. This overlies old windslabs and the March 3 rain crust. Feb 15 crust down 70-120 cm exists up to 2000m. Lower snowpack is well settled 1F to P. HS 250-300 cm near the continental divide.

Avalanche Summary

Numerous natural loose wet avalanches to sz 1.5 were observed Sat from steep terrain and rocks at peak solar. Several natural windslab avalanches, sz 1 -2, were observed in alpine lees. Observed from a far a crown above Forum Lake, suspect wind slab avalanche sz 3 from last 24 hrs. Please report any observations to the Mountain Information Network

Confidence

Due to the number of field observations

Régions couvertes