Bollettino valanghe

Banff Yoho Kootenay

Mar 11 – 12, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 9 years ago

Pericolo valanghe

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

In sintesi

The danger is Low/Low/Low in the morning, but rising with daytime warming and sun. Start and finish early and avoid exposure to solar aspects and cornices once the sun is out.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–1.5
    Alpine West winds formed windslabs last week. These are bonding, but in steep unsupported terrain, skier triggering is still possible.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1–2
    Expect loose wet avalanches to initiate from steep rocky terrain. Watch for increasing hazard associated with prolonged sun affect. Finish very early, or better yet, avoid steep confined features all together.

Weather Forecast

Expect the daily diurnal temperature variation to continue, each day a little bit warmer than the last. Freezing levels will rise to ~2500m later in the week, and dropping to valley bottom overnight. Clear skies will also provide a condition for intense solar radiation. Wind will remain light from the SW.

Snowpack Summary

Facetted, wind effected snow exists in the alpine. A sun crust has formed on solar aspects at treeline and below. The deeper facet layers down 80-150 cm remain weak and are currently dormant, but could become active with the warm days ahead.

Avalanche Summary

Evidence of a loose wet avalanche cycle was isolated to steep solar gullies. Also observed were a few size 2 slabs on steep solar convex rolls.

Confidence

Due to the number and quality of field observations

Regioni coperte