Bulletin d’avalanche

Jasper

Nov 29 – 30, 2020
Voir sur la carte
Archivé · expiré 6 years ago

Danger d’avalanche

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

Points saillants

Let the 20-30cm of new snow stabilize and make conservative decisions the next few days. There will be high consequence if you tickle a slope in the wrong spot.

Problèmes avalancheux

  • Wind Slabs

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

    20cm of new snow Friday night with strong winds created wind slabs on many ridgetop features. Be cautious of local wind influences where reverse  or cross loading may have occurred.

  • Loose Dry

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

    The new snow has enough mass to warrent this problem. Give it a few days to settle particularly in steep gullies.

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3

    20-30cm of new snow will require a day to bond and settle. Be patient.

Weather Forecast

Sunday will be cloudy, flurries, -11 C, and light SW winds. Monday will be flurries, 6cm of snow, -13C, and light SW winds gusting to 50km/hr. Tuesday will be sun, no snow, -15C and light West winds.

Snowpack Summary

Friday night there was 20cm of new snow and strong Westerly winds. A lot of snow got whisked away in exposed locations and powder settled into sheltered locations. The snowpack remains highly variable with either soft or wind effected surface snow. Parkers weather plot has 101cm. A crust from Nov 4 is 70cm deep and found up to 2600m.

Avalanche Summary

Saturday's explosive control at Parkers slabs resulted in two size 2.5 avalanches from the wind loaded storm snow. A few other thin slabs were noted in steep alpine terrain. The visibility was good.

Confidence

Due to the number and quality of field observations

Régions couvertes