Bollettino valanghe

Jasper

May 12 – 13, 2019Parks Canada
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Archiviato · scaduto 7 years ago

Pericolo valanghe

Tue
Wed
Alta quota
4 · Forte
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato
Apri la mappa completa

In sintesi

Deep avalanche problems are waking-up with warm temperatures resulting in numerous large avalanches. If you go exploring the alpine make sure there has been a good overnight freeze and be out of avalanche terrain before the heat of the day.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3.5

    Occasional cornice falls are expected, some of these may trigger large slab avalanches, running well down into lower elevations.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1.5–3

    Weak mid-pack facets and upper-snowpack are reactive, especially on shaded, northerly slopes. This is a Wet Slab problem on solar aspects, as water accumulates above strong crusts.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–2

    Summer like temps have created an avalanche cycle. With minimal overnight freezes and more sunny days forecasted this problem will continue for the next while. Limited snow below treeline but one could expect it to be very isothermal and reactive.

Weather Forecast

For Parker Ridge Area

Monday: Cloudy with sunny periods. Treeline temperature: High 9 C. Light ridge wind. Freezing level: 3000 metres.

Tuesday: Showers. Precipitation: 9 mm. Treeline temperature: Low 1 C, High 7 C. Ridge wind southwest: 15-35 km/h. Freezing level: 2800 metres.

Wednesday: Cloudy with sunny periods and isolated wet flurries.

Snowpack Summary

Where snow still exists below treeline, expect slush. At treeline there is still snow on shady aspects but quickly becoming slushy during the day. In the alpine a fresh dusting of snow is being moved around by SW winds and crusts and other deep persistent slab problems are resulting in avalanches due to daytime heat and minimal refreezes overnight.

Avalanche Summary

Since the warming trend started on Friday there has been a widespread avalanche cycle. Numerous loose wet avalanches up to size 2 in the alpine and treeline. Several slab avalanches and cornice failures to size 3.5 have been observed in the alpine on all aspects but predominantly on NE to NW aspects .

Confidence

Freezing levels are uncertain

Regioni coperte