Bollettino valanghe

Kootenay Boundary

Mar 31 – Apr 1, 2015Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 12 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

Warmth remains the main driver of avalanche hazard as we shift into a more spring like pattern. Minimize your exposure to large slopes if the snowpack is becoming moist or wet.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Upper elevation winds have been out of the west at slab-forming speeds for the past 48 hours.  Stay on guard for fresh and potentially touchy wind slabs, especially if your travel plans include terrain immediately lee of ridge-crest.

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–4
    Many ridge-lines are wearing visor like cornices.  These large, vulnerable and dangerously heavy chunks of snow hang precariously over many alpine features.

Confidence

Good

Weather Forecast

Wednesday: Broken cloud cover. Freezing level hovering around 1500m. No significant precipitation. Moderate NW winds at all elevations.Thursday: Freezing level starting around 1000m, rising to around 1700m in the afternoon. Light NW/W winds at all elevations. Few clouds in the morning increasing to 80% cloud cover in the afternoon.Friday: Freezing level starting near 1000m, rising to approximately 1700m in the afternoon. Light SW winds at all elevations.  No significant precipitation expected.

Avalanche Summary

On Monday warm temps led to a natural wet slab failure. The size 2 avalanche ran on a steep NE facing feature at 2200m.

Snowpack Summary

Monday night brought the best re-freeze in recent memory which probably formed a surface crust. 3 - 10 cm of moist snow lie between this surface crust and the March 24th crust that is up to 20cm thick. Below this crust 15 to 60cm of moist rain soaked snow can be found which all rests on the mid-March crust/facet complex. It looks like we'll be into a more spring like melt-freeze cycle for the forecasting period which should start to tighten up the upper snowpack. The mid and lower snowpack are already strong and well settled.

Regioni coperte