Bollettino valanghe

Northwest Inland

Dec 19 – 20, 2023Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 3 years ago

Pericolo valanghe

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

In sintesi

Buried weak layers are likely susceptible to human-triggering. Choose low-consequence terrain for safer riding.

Problemi valanghivi

  • Wind Slabs

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

    Watch for pockets of deeper, wind deposited snow in alpine features like ridges and gullies.

  • Persistent Slabs

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

    Buried layers of weak surface hoar crystals remain problematic in any areas that have enough snow to avalanche.

Terrain and Travel Advice

  • Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
  • Avoid areas where the snow feels stiff and/or slabby.

Confidence

Moderate

Avalanche Summary

No new avalanches have been observed or reported over the weekend period

On Friday a machine triggered size 1.5 avalanche on an east aspect at treeline was reported. It may have failed on buried surface hoar.

A few natural wind slab avalanches, size 1 to 2, were reported on Thursday on the Grizzly Plateau and are suspect to have failed on a weak layer of surface hoar buried 25cm down.

If you do go into the backcountry, consider submitting a Mountain Information Network report.

Snowpack Summary

Widespread wind-affected surfaces exist at higher elevations with roughly 30 cm of recent snow that has been redistributed by strong southwest alpine winds.

Two different surface hoar layers have been reported in the upper half of the snowpack and appear to be most prominent at treeline and below.

In general, the snowpack is still shallow for this time of year with snowpack depths at treeline ranging from 50 to 100 cm. Early season hazards are still a concern.

Weather Summary

Monday Night

Mostly cloudy, 5 to 10 cm accumulation, ridgetop winds southwest 30 km/h, treeline temperature -5 °C.

Tuesday

Cloudy, 5 to 10 cm accumulation, ridgetop winds south southwest 30 km/h, treeline temperature -8 °C.

Wednesday

Mostly cloudy, 1 to 5 cm accumulation,, ridgetop winds south west 60 km/h, treeline temperatures -4 °C.

Thursday

Mostly cloudy, 1 to 5 cm accumulation,, ridgetop winds south west 40 km/h, treeline temperatures -6 °C.

More details can be found in the Mountain Weather Forecast.

Regioni coperte