Bollettino valanghe

Jasper

Jan 30 – 31, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 9 years ago

Pericolo valanghe

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

In sintesi

Rapid loading on top of persistent weak layers is expected to create dangerous avalanche conditions over the next few days.Closures of HW 93 (Icefield Parkway) will be in effect starting Jan 29 for control work. 511.Alberta.ca for updated  info.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    This problem is made up of 3 significant interfaces in the upper snowpack. Incoming new snow may overload these layers, which have recently been reactive to skier testing and explosive control work, producing a few very significant results.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–1.5
    Watch for sluffing in steep terrain.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2
    Incoming new snow and wind will build fresh storm slabs.

Weather Forecast

Heavy snowfall Monday night, with amounts between 20-40cm possible for the Columbia Icefields area. Moderate SW winds to accompany this snowfall. Pressure rising mid-week as precipitation tapers. Temperatures will drop later in the week as an Arctic ridge establishes itself along the Eastern slopes of the Rockies.

Snowpack Summary

Incoming new snow is building fresh storm slabs and is falling on a persistent slab made up of 3 weak interfaces in the top 30 to 50cm of the snowpack. Depth and distribution of these weak surface hoar/facet layers varies within the terrain; although buried surface hoar has consistently been found in sheltered features at TL.

Avalanche Summary

Avalanche control on Parkers Ridge Friday produced 2 large avalanches, size 2 and 3 on a NE aspect running as a persistent slab. Numerous sloughs observed today from steep rocky terrain.

Confidence

Forecast snowfall amounts are uncertain

Regioni coperte