Bollettino valanghe

Jasper

Jan 14 – 15, 2021
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Archiviato · scaduto 6 years ago

Pericolo valanghe

Fri
Sat
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato

In sintesi

Hwy 93 remains closed with tentative opening

Thursday January 14, 2pm.

New snow will need time to settle. Be extremely cautious, use good group travel techniques, and avoid any exposure to terrain traps.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3

    Use caution around thin to thick areas where buried deeper weak layers could be triggered. The surface hoar layer down 40-70cm seems unreactive and spotty distribution but keep it on your radar especially with the new snow load.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–1.5

    Ice climbers be wary of this problem as even small avalanches can have serious consequences. Wet loose in steep terrain below treeline may also become a problem depending on the freezing level and potential rainfall.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–2.5

    Soft slabs on lee aspects in the alpine and open tree line; storm slab building all aspects tree line and below. January 12 interface includes previous hard slab in the alpine and patchy surface hoar sheltered tree line and below tree line.

Weather Forecast

Thursday: A mix of sun and cloud. no precip. Alpine temperature: High -9 °C. Ridge wind west: 10-20 km/h.

Friday: Cloudy with sunny periods and light flurries. Alpine temperature: Low -11 °C, High -9 °C. Ridge wind west: 20 km/h gusting to 60 km/h.

Snowpack Summary

25cm, and upwards of 55cm storm snow through the forecast region. Jan 12 interface is somewhat of a mystery, possibly a temp or rain crust, FC and/or SH with inconsistent reactivity. All over a supportive mid pack. Basal snowpack is weak facets and depth hoar.

Avalanche Summary

Significant natural cycle up to size 3.5, mostly in the Alpine and open features but, significant observations between 2200m and 1800m, mostly S through Westerly aspects.

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Confidence

Wind effect is extremely variable

Regioni coperte