Bollettino valanghe

Long Range Mountains

Avalanche Canada
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Pericolo valanghe

Mon
Tue
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
Senza grado
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Non aggiornato — questo bollettino è scaduto 6 months ago. Stai vedendo condizioni passate, non il bollettino in corso.

In sintesi

Wind slabs are likely to form with strong wind and snow forecast.

Avoid steep slopes in the alpine that may have a buried sun crust, as you could trigger a large avalanche on a buried weak layer.

Problemi valanghivi

  • Wind Slabs

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

    Wind-loaded slopes may be triggered by riders. Look for wind effect and avoid loaded slopes.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–2.5

    A weak layer of crust with sugary facets on top has been seen on steep slopes that face the sun. Avoid being on or underneath these slopes, as it may take several days to heal.

Confidence

Moderate

  • We are uncertain due to a limited number of field observations.
  • We are uncertain due to how buried persistent weak layers will react with the forecast weather.

Avalanche Summary

On Friday, many small (size 1) wind slabs were seen in the Blow Me Downs, which were estimated to have occurred within the last 2 days.

A large avalanche occurred on the south aspect of Blue Hill on Sunday Feb 22, when a rider triggered a slab and was carried by it. Read a report from the field team here.

Snowpack Summary

There is anywhere from 15 to 30 cm of soft snow that fell this week. In wind-exposed areas, it has been redistributed into lee features, forming slabs.

20 to 40 cm deep, on steep southeast through southwest slopes, a crust with weak, sugary facets on top has been observed. If triggered, this layer could produce large avalanches.

The mid and lower snowpack is well settled, with no layers of concern.

Weather Summary

Saturday Night
Partly cloudy. Trace snow. 60 to 100 km/h southwest ridgetop wind. Treeline temperature -4 °C, rising to near zero.

Sunday
Mostly cloudy. 2 to 4 cm of snow. 100 km/h southerly overnight, easing to 40 km/h southwest ridgetop wind. Treeline temperature -4 °C Sunday.

Monday
Mix of sun and clouds. Near 10 cm of snow. 20 to 50 km/h west ridgetop wind. Treeline temperature -16 °C.

Tuesday
Mostly cloudy. 3 to 5 cm of snow. 60 to 90 km/h west ridgetop wind. Treeline temperature -10 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be aware of the potential for large avalanches due to buried weak layers.
  • Minimize exposure during periods of heavy loading from new snow and wind.
  • Be careful as you transition into wind-affected terrain.
  • Wind slabs are most reactive during their formation.
  • Use small, low consequence slopes to test the bond of the new snow.

Regioni coperte