Bollettino valanghe

Lizard-Flathead

Mar 17 – 18, 2023Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 4 years ago

Pericolo valanghe

Sun
Mon
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Avalanche Danger will increase as the temperature rises through the day and the sun impacts slopes facing the sun.

Problemi valanghivi

  • Cornices

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

    The full impact of the march sun may weaken cornices.

  • Wind Slabs

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

    Southwest winds have redistributed snow from earlier in the week to build wind slabs in alpine and treeline lees.

  • Loose Wet

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

    Steep rocky terrain facing the sun is likely to see thin loose wet avalanches release during the heat of the day.

Confidence

High

Avalanche Summary

Several large (size 2) natural slab avalanches were reported near Fernie on Thursday. The group observed the avalanches release when the sun hit open alpine slopes.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

20-40 cm of dense, wind-affected storm snow falling earlier in the week in the alpine tapers to a rain crust below 1400 m. This storm snow may sit on a sun crust on solar slopes and small surface hoar in sheltered, shaded areas.

The mid-snowpack is generally well-settled. The lower snowpack includes a layer of weak sugary crystals near the ground. This layer has not produced recent avalanche activity.

Weather Summary

Friday Night

Mainly clear. Treeline temperature -9 °C. Wind light southwest. Freezing level at valley bottom.

Saturday

Mainly sunny with cloudy periods. Treeline temperature -2 °C. Wind light southwest. Freezing level rising to1800-2000m.

Sunday

Mix of sun and cloud. Treeline temperature -1 °C. Wind light southwest. Freezing level rising to 2000m.

Monday

Mainly cloudy with scattered flurries. Treeline temperature -4 °C. Wind light east. Freezing level 1400m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Avoid sun exposed slopes when the solar radiation is strong, especially if snow is moist or wet
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Regioni coperte