Bollettino valanghe

Jasper

Jan 10 – 11, 2013Parks Canada
Vedi sulla mappa
Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

Avalanche control work is planned on Thursday and Friday on the Icefields Parkway.  Expect intermittent closures between 10 am and 4 pm on Thursday and a 5-hour closure between Jasper and Saskatchewan Crossing starting at 10am on Friday. 

Problemi valanghivi

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–2
    30 cm of unconsolidated storm snow is sitting on 30-60 cm of weak sugary facets in most areas below tree line.  Numerous loose avalanches have been observed that have involved the entire snowpack. 

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–3
    30-50 cm thick soft slabs have formed especially on lee slopes. 30 cm of storm snow have been accompanied by moderate gusty SW alpine winds. 

Weather Forecast

An arctic front is moving in behind Wednesday's storm.  Winds will be light NW, temperatures will cool to around -10 and broken skies. We expect another cm or 2 of snow on Thursday.

Snowpack Summary

Up to 30 cm of storm snow fell on Wednesday.  Below tree line, this new unconsolidated snow is sitting on a thin facetted snowpack.  In sheltered tree line areas the storm snow is sitting on a supportive mid-pack.  In wind exposed tree line and alpine areas, a 30-50 cm deep soft wind slab has formed on the previously faceted surface. 

Avalanche Summary

Visibility was poor today but numerous size 1 loose snow avalanches were observed on steep slopes and in gulleys below tree line.  These avalanches started in the storm snow and seem to step down to ground involving the weak facet snowpack.  No slab avalanche activity has been observed. 

Confidence

The weather pattern is stable

Regioni coperte