Bollettino valanghe

South Coast Inland

Dec 15 – 16, 2019Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 7 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

Conditions vary significantly from north to south within the region. In the north, avalanche danger is likely moderate in the alpine and low at treeline and below treeline. In the south, avalanche danger remains elevated as storm slabs sit on a buried weak layer.

Problemi valanghivi

  • Storm Slabs

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

    Conditions are highly varied from north to south within the region.

    In the south, up to 45 cm of recent fresh snow likely sits on a weak layer of surface hoar. Storm slabs may still be reactive, especially in wind loaded areas.

    In the north, new snow amounts are closer to 10 cm. There may still be small pockets of storm slabs that could be triggered by humans at higher elevations.

Confidence

Moderate - Uncertainty is due to field data and reports showing a wide variation in conditions throughout the region.

Weather Forecast

SATURDAY NIGHT - Cloudy with clear periods and isolated flurries / light northwest winds / alpine low temperature near -7

SUNDAY - Cloudy with sunny periods and isolated flurries / southwest wind 15-30 km/h / alpine high temperature near -7

MONDAY - Cloudy with scattered flurries / southwest wind, 25-50 km/h / alpine high temperature near -2

TUESDAY - Flurries / southwest winds, 40-60 km/h / alpine high temperature near -1 / freezing level 1000 m

Avalanche Summary

There have been no recent reports of avalanches, but observations are very limited in this region.

In the south of the region: With up to 40 cm of recent new snow and strong winds, it is likely that there were natural avalanches on Thursday and Friday, especially in wind loaded areas. Natural avalanche activity is expected to taper somewhat over the weekend. There is still the potential for human triggered avalanches at higher elevations.

In the northern part of the region: There have been no avalanches reported in recent days. There may be isolated pockets of wind slab and/or storm slab at higher elevations that could be triggered by humans.

Snowpack Summary

Snowpack conditions vary greatly from north to south within the South Coast Inland region.

In the south, near the Coquihalla, up to 45 cm of recent fresh snow snow likely sits on a weak layer of surface hoar. Previous strong winds have likely formed storm slabs that may be reactive to human triggers. The middle of the snowpack contains a mix of hard crusts and facet/crust layers. Snowpack depths remain quite shallow with about 

75-100 cm at upper treeline elevations.

In the north, near the Duffey Lake area the recent storm only brought about 10-15 cm of new snow, which is now sitting on an already very thin snowpack. Snowpack depth at treeline is about 40-50 cm.

Regioni coperte