Bollettino valanghe

Kananaskis

Feb 26 – 27, 2023Avalanche Canada
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Archiviato · scaduto 4 years ago

Pericolo valanghe

Tue
Wed
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato

In sintesi

Natural avalanche activity is tapering, but still happening. Avoid wind loaded terrain in the alpine!

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely - Certain
    Dimensione
    1–2.5

    Sustained winds have begun to expose gravel in the alpine. Treeline winds are still variable which means slabs could be anywhere.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    2–3.5

    Our snowpack has gained enough depth/strength to not sink to the ground every step. Unfortunately the deeper layers haven't changed. The entire lower half is either facets, or depth hoar.

Confidence

Moderate

Avalanche Summary

Natural activity continued today. Active avalanches were reported near Tent ridge. Sz 2-2.5 and running full path.

Snowpack Summary

Today we went to dig a profile at one of our standard locations, the Dog Leg area. We found 152 cm of snow in a moderately wind loaded treeline area. The 20-30cm of new snow is sitting on a 2cm thick, dense (pencil) wind crust layer. We wondered if this is what the recent cycle was sliding on, but that's just speculation. We had a failure on that layer in tests. Below the wind crust, we encountered the dreaded facets at about 50cm down. The Nov interface is down 110cm. Here, the snowpack is mostly depth hoar and large facets. On a more general note the winds were transporting tons of snow today. Any exposed area from E to S is heavily loaded. Cornices are also growing with the wind.

Weather Summary

Wind. Sailors might like a forecast like ours, but for us skiers/climbers/winter enthusiasts, the wind gets old in a hurry! Winds will increase yet again tonight with high alpine wind hitting the 70km/hr range, but fading to a mere 50km/hr by noon. In lower terrain, expect more like 30-40km/hr and gusty. Skies will be mixed, with maybe a few flurries. Does snow whipped up by the wind count as a flurry? Temperatures? These will be between -12 and -8.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Be aware of the potential for surprisingly large avalanches due to deeply buried weak layers.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

Regioni coperte