Bollettino valanghe

Jasper

Nov 22 – 23, 2017Parks Canada
Vedi sulla mappa
Archiviato · scaduto 9 years ago

Pericolo valanghe

Thu
Fri
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte
Apri la mappa completa

In sintesi

Hazard will be increasing the next few days with warm temperatures, rain, snow at higher elevations, and strong winds. 

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2–3
    Expect incoming snow to overload the Halloween crust.  This may produce our first cycle of large avalanches this season.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–3
    Total new snow accumulations may reach 60cm by Friday.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2
    The distribution of this problem will be tied to the freezing levels.  Rainfall may occur up into the alpine in the coming days.

Weather Forecast

A strong moist southwest flow will drive the weather for the next few days.Tonight: 16cm of snow, with alpine lows of -4, and mod-strong SW windWednesday: 9cm of snow, alpine highs of +1, freezing level 2400m, and mod-extreme SW windThursday: 26cm of snow, alpine highs of +1 and lows of -5, freezing level 2200m, mod-extreme SW wind

Snowpack Summary

Incoming new snow, accompanied by strong winds and warm temps, will quickly form fresh slabs.  These will fall on top of the 20-60cm of snow already burying the Oct 31 crust, which is a likely failure plane for persistent slab avalanches. 

Avalanche Summary

A patrol on Monday's observed numerous fresh size 2's mainly at treeline but also a few noted in lower alpine locations. They ranged from 35-45 degrees, 100m wide, 20-40cm deep, and some ran down in to the runouts of larger avalanche paths. No patrol occurred on Tuesday.

Confidence

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

Regioni coperte