Bollettino valanghe

Northwest Inland

Feb 2 – 3, 2023Avalanche Canada
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Archiviato · scaduto 4 years ago

Pericolo valanghe

Sat
Sun
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato

In sintesi

New snow may not bond well to underlying crusts. Use caution as you transition into places where wind slab is forming and in features where storm slabs have settled and stiffened.

Problemi valanghivi

  • Wind Slabs

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

    New snow has been blown in touchy wind slabs in lee and cross loaded features. Use caution in wind affected features and monitor for stiff snow and or shooting cracks.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3

    A number of buried weak layers remain possible to trigger. These layers appear to be most problematic in upper treeline and alpine elevations, in shallow, variable, rocky start zones.

Confidence

Moderate

Avalanche Summary

A few new small wind slab avalanches have been reported in the region.

Backcountry users continue to report evidence of a significant avalanche cycle during the recent warm, wet, and windy weather last week. The majority of these avalanches were wind slabs, however, a number of avalanches stepped down to buried persistent layers, creating large, scary avalanches, like this one in the Telkwa area from Friday.

If you are out in the backcountry please consider filling out a Mountain Information Network report.

Snowpack Summary

There is now up to date 35 cm of storm snow over top of crusty surfaces from recent warming on January 25th. Some of this snow has been blown into wind slabs that can be easily triggered.

The mid and lower snowpack continues to bond and stabilize while a number of buried weak layers remain a concern and have produced a number of large recent avalanches.

Weather Summary

Wednesday night

Cloudy. 5 to 10 cm of new snow. Wind from the south at 25 km/h. Temperature -8 C.

Thursday

Cloudy. 10 cm of new snow. Wind from the south up to 30 km/h. Temperature -4 C.

Friday

Mostly cloudy. 5 cm of new snow. Wind from the up to 30 km/h. Temperature 0 C.

Saturday

Mostly cloudy. 5 cm of new snow. Wind from the up to 30 km/h. Temperature 0 C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • In areas where deep persistent slabs may exist, avoid shallow or variable depth snowpacks and unsupported terrain features.

Regioni coperte