Bollettino valanghe

Lizard-Flathead

Mar 22 – 23, 2022Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 5 years ago

Pericolo valanghe

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

In sintesi

Avalanche danger will increase during periods of strong solar radiation.

Head out with a conservative mindset and dial back your terrain choices until the weather cools.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2

    Recent snowfall and westerly winds are expected to have formed wind slabs on lee features in the alpine. 

  • Cornices

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

    Cornices have grown significantly in the past two weeks. Warm temperatures may make cause cornices to become weak. Cornice failures are dangerous on their own, but also have the potential to trigger larger avalanches on the slopes below.

    Give them a wide berth when travelling on ridge-lines and minimize overhead exposure to large cornices.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2.5

    If the sun comes out on Wednesday, warm temperatures compounded by strong solar radiation may weaken the upper snowpack, creating wet loose avalanches out of steep terrain.

Avalanche Summary

Over the past two days, a few natural cornice failures (size 1-2) have been observed, with some initiating slab avalanches on the slope below. Several small wet loose avalanches have been observed on south-facing aspects from solar radiation and daytime warming (size 1).

Confidence

Moderate - Uncertainty is due to the timing or intensity of solar radiation and its effect on the snowpack.

Weather Forecast

TUESDAY NIGHT: Mainly cloudy. Light to moderate southwesterly winds. Freezing level around 2000 m.

WEDNESDAY: Cloudy with light precipitation. Moderate to strong southwesterly winds. Freezing level around 2500 m.

THURSDAY: Partially cloudy. Light westerly winds. Freezing level around 2000 m.

FRIDAY: Partially cloudy. Light southwest winds. Freezing level around 1600 m.

Snowpack Summary

10-15 cm of recent snowfall overlies 20 to 40 cm of heavy powder at upper elevations, while warm temperatures have left moist and crusty surfaces below 1800 m on all aspects and into the alpine on south-facing aspects. The upper snowpack contains several crust layers, and the snow is well bonded to these crusts.

Terrain and Travel

  • The more the snowpack warms-up and weakens, the more conservative you`ll want to be with your terrain selection.
  • Avoid steep slopes when air temperatures are warm, or solar radiation is strong.
  • Cornices become weak with daytime heating.
  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.

Regioni coperte