Bollettino valanghe

Jasper

Mar 19 – 20, 2018Parks Canada
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Archiviato · scaduto 9 years ago

Pericolo valanghe

Wed
Thu
Alta quota
1 · Debole
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Snowfall amounts on Thursday are expected to be light, but elevated accumulations would increase the avalanche danger.

Problemi valanghivi

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    Storm slabs sit on a hard melt-freeze crust on solar aspects, and facets on polar aspects. Assess the bond at these interfaces carefully before committing to avalanche start zones.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–1.5
    Watch for snowpack to become reactive if the sun comes out.

Avalanche Summary

A road patrol Sunday noted solar aspects treeline and below have been producing loose wet avalanches to size 1 for several days. An isolated large avalanche (size 2.5) which occurred on a steep rock slab, on a NE aspect in the alpine (2500m) had slid in the last few days. The dimensions of this slab were 300m wide by 100cm deep.

Confidence

Freezing levels are uncertain on Wednesday

Weather Forecast

Cont' broken skies and light flurries, mild temps and moderate overnight recovery of surface crusts. Light to mod westerly winds until Thursday.Thursday-Fri. Winds increase and shift South as a trough sweeps through with 10-15cm of snowfall. Freezing levels should edge upward and top 2000m on Thursday but otherwise remain below treeline.

Snowpack Summary

10-15cm of dense snow week over 4 days has created thin storm slabs which have bonded well at treeline and below, but may remain reactive on alpine shaded aspects. Loose wet slides are likely below treeline in the late afternoon (particularly with direct sun). Facets buried beneath February's multiple windslabs may still produce thin slabs.

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