Bollettino valanghe

Northwest Inland

Jan 7, 2019Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

Tue
Wed
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Caution as you transition into wind exposed terrain, some new snow combined with winds that have been blowing from a variety of directions have developed wind slabs on a variety of aspects.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2.5
    Recent strong winds have affected treeline and alpine terrain. Wind slabs may linger in the lee sides of terrain features. Should one be triggered, it is possible that it may scour to the ground, particularly in thin snowpack areas.

Confidence

Moderate - Due to the number of field observations

Weather Forecast

SUNDAY NIGHT: Cloudy with scattered flurries, moderate southwest winds, alpine temperature -13 CMONDAY: Mix of sun and cloud, moderate west winds, alpine temperature -10 CTUESDAY: Mainly cloudy, moderate southeast winds, alpine temperature -11 CWEDNESDAY: Flurries with 5-10 cm accumulation, moderate southeast winds, alpine temperature -9 C

Avalanche Summary

There have not been any recent reports of avalanche activity in the south of the region. Reports from Ningunsaw in the far north of the region on Friday, show explosives controlled avalanches running to size 2.5 with evidence of a previous natural avalanche cycle that was suspected to have happened during the storm earlier in the week. These avalanches were suspected to run on a weak layer of feathery surface hoar buried in late December and some were reported to have failed to the ground.

Snowpack Summary

10-15 cm of new snow over past two days along with moderate to strong and variable winds have produced variable surfaces at treeline and alpine elevations. Expect to find wind-scoured surfaces as well as wind slabs in lee terrain features. Below treeline, expect to find a melt-freeze crust near the snow surface.Buried under recent storm snow, you may find a few weak layers in sheltered areas comprising of feathery surface hoar crystals and/or sugary faceted snow. The upper layer was buried around December 31 and is about 20-30 cm deep. The next layer may have been buried around December 22 and is likely 40-60 cm deep. The lower one was buried in early-December and is now approximately 80-120 cm deep. The bottom 30 to 50 cm of the snowpack consists of weak and sugary faceted grains and crusts, particularly in areas where the snowpack is thin. It is possible that shallower avalanches could scrub down to ground in these thin snowpack areas, due to this weak layer at the base of the snowpack.

Regioni coperte