Bollettino valanghe

Jasper

Jan 7 – 8, 2013Parks Canada
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Archiviato · scaduto 14 years ago

Pericolo valanghe

Mon
Tue
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Surface hoar has just been buried. Assess for possible windloading over this weakness the next few days. Loose sluffs appear to be picking up enough mass to be a concern for ice climbers. Quality skiing is limited to sheltered treeline locations.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–3
    Wind slabs can be found above tree line in exposed terrain. These slabs have been unreactive to skier traffic; however, it remains possible to trigger one in steep unsupported terrain. Assess your transitions for changing conditions.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Loose snow avalanches are possible in steep thin snowpack slopes and gully features as facetting process dominates. Solar triggering is most likely initiator but not solely responsible. They may  knock you off a climb or bury you in a terrain trap.

Weather Forecast

Sunday overnight will bring light flurries. Monday may have a weak warm front followed by a cold front in the evening with limited amounts of snow. Expect gusty overnight winds. Tuesday is an unsettled and cool airmass with gusty alpine winds. Tuesday night into Wednesday may bring a more organized system but still too far away to have confidence.

Snowpack Summary

7mm surface hoar formed over New-years. It is now buried by 5cm of new snow. We call this the 'Jan 6th layer' which will need to be assessed as snowload increases. The mid-pack remains supportive where the snow depth is more than a meter otherwise facetting continues where shallow. Wind slabs are present in lee features at treeline and above. 

Avalanche Summary

Avalanche patrols were conducted on the Maligne Road and the Icefields Parkway Saturday. Visibility was excellent and no new avalanches were observed other than a few loose size 1.5-2 out of very steep rocks where snowpack is shallow facetting it to point of no internal cohesion. Trigger likely was solar influenced but not for all. 

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Regioni coperte