Bollettino valanghe

Kananaskis

Jan 26 – 27, 2020Avalanche Canada
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Archiviato · scaduto 7 years ago

Pericolo valanghe

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

In sintesi

Warm temps are promoting new windslab development in alpine areas and with stronger winds forecast on Sunday, we can expect these slabs to grow and become stiffer and more reactive. Pay close attention to freezing levels, stability will decrease on solar aspects of the sun comes 

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1.5–2.5

    Cooler temps are helping to make the recent windslabs less reactive but any steep or unsupported feature should be treated with an abundance of caution.  

  • Deep Persistent Slabs

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

    These are still on the radar. It's worth digging or probing to inspect it. Large triggers are also worth considering, if the bottom layer is disturbed it will be a very big avalanche. 

Avalanche Summary

Nothing new today but observations were limited.

Confidence

Moderate -

Weather Forecast

The freezing level will begin dropping tonight as we have overnight lows of around -12C forecast for the region. Light snow will fall tomorrow along the divide but overall accumulations are not expected to be significant. Sunday will be pretty much a carbon copy of Saturday with daytime highs around -4C. The biggest difference is winds are forecast to increase mid morning sunday with it returning to moderate to strong out of the SW.  

Snowpack Summary

10-13cm over the past 24hrs. A thin temperature crust was being found on solar aspects below 2000m early this morning. Easy sheers were being noted in the new windslabs that formed friday in open areas down 20-30cm and the dec 31st SH/FC layer continues to produce moderate- hard sudden planar sheers down 40-50cm below 2300m. Any avalanche in the upper snowpack will likely step down the the weak basal layers and be big. Be thinking about consequences. If the sun comes out, watch for stability to decrease especially on solar aspects.

Terrain and Travel

  • Seek out wind sheltered terrain below treeline where you can avoid wind slabs and find great riding.
  • Be aware of the potential for large avalanches due to the presence of a deep persistent slab.
  • Avoid slopes that sound hollow or drum-like.

Regioni coperte