Bollettino valanghe

Jasper

Mar 31 – Apr 1, 2016Parks Canada
Vedi sulla mappa
Archiviato · scaduto 11 years ago

Pericolo valanghe

Sat
Sun
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte
Apri la mappa completa

In sintesi

Avalanche control is planned for the Columbia Icefields area  on  Friday afternoon during which time the Parkway will be closed it that area. Maligne Lake  road is closed due to avalanche danger.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2
    Increase occurrence of cornice failures are being noted. It can act as a large trigger initiating deep weaknesses plus their sheer mass, whether or not it initiates an avalanche, would be like being hit by a car.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    This problem will increase with forecasted warm temps and intense solar radiation. The danger rating will rapidly increase particularly on thin snowpack zones and sun facing slopes. Loose avalanches can initiate larger avalanches below.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    This problem is becoming more active. When triggered, it will be big with serious consequences. Warm and sunny conditions will increase this danger. Steep sun facing rocks, cornice failures, and loose avalanches from above are on going.

Weather Forecast

Winds will remain  north westerly and freezing levels are expected to reach 2,800m on Friday with the potentially of double digit temperatures close to treeline. Expect sun. Overnight recovery will be minimal. Winds will switch more westerly into the weekend and temperatures will cool slightly bring the freezing down to near 2000m as it does.

Snowpack Summary

The snowpack is heating up and rapidly approaching isothermal conditions at and below treeline. Higher in the alpine and on northerly aspects  more winter like conditions prevail. Cornices are large and of particular concern for their ability to trigger large avalanches along mid pack weakness. Freezing will not occur tonight.

Avalanche Summary

The solar radiation is energizing the snowpack and numerous avalanche have been reported today from all elevations. Both loose moist avalanches and dry slab avalanches have occurred up to size 2. Point release events from steep rocky alpine terrain are able to trigger deeper instabilities creating much larger avalanches that can scrub to ground.

Confidence

Regioni coperte