Bollettino valanghe

Jasper

Mar 20 – 21, 2014Parks Canada
Vedi sulla mappa
Archiviato · scaduto 13 years ago

Pericolo valanghe

Sat
Sun
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

The new snow will be enticing however forecasters have little confidence in this snowpack.  Cautious route finding and conservative decision making are essential.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Windslabs are forming in wind prone areas below lee ridgelines at treeline and above.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    The "drought layer" (Feb 10) has been sensitive in the past week, contributing to numerous large avalanches. Pay particular attention to moraines at treeline and cross-loaded features in the alpine.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Another 15 cm of new snow fell on top of this past weekend's 35cm storm. Although this snow appears to be bonding well, caution is warranted in steep terrain. Test the storm snow interface prior to committing to your line.

Weather Forecast

Flurries will continue into the weekend.  Winds are expected to remain light and temperatures will be anything but spring like with lows dipping to -20 and only recovering to -5 during the day.

Snowpack Summary

5 to 15 cm of new snow fell on top of the 30 cm of settled storm snow we received last weekend. This snow has buried various surfaces including windslab. The Feb. 10th drought layer is now almost a meter deep in the snowpack.  Basal facets are still lurking at the base of this snowpack.

Avalanche Summary

No new observations today in the Marmot area. Patrols in the past few days observed the debris from numerous large avalanches. These avalanches exhibited wide propagation, were primarily found in big East facing alpine terrain, and several were triggered by cornice fall.

Confidence

Due to the number and quality of field observations on Friday

Regioni coperte