Bulletin d’avalanche

Jasper

Dec 6 – 7, 2017Parks Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Good skiing exists in sheltered areas near treeline. Thursday may have freezing levels rising to 3400m which is unusual for this time of year. Expect the danger to increase with unseasonably warm temperatures.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–3
    Wind slabs are present on lee aspects. Bond strength of these slabs to the snowpack below is uncertain.

Weather Forecast

Wednesday will be mainly sunny, no new snow, high of 1 degree, 10-20km/hr NW winds, and 2100m freezing level. Thursday will be sunny, alpine temperature of 4 degrees, light NW winds, and 3400m freezing level. This spike in freezing level is unusual for this time year. Friday will be sunny, light West winds, and 2200m freezing level.

Snowpack Summary

Wind slabs are in exposed lee features. A significant crust (Black Friday, Nov.23) can be found down 30 to 70cms. A persistent slab overlays this crust and so far the bond appears to be strengthening at this interface. The Halloween crust sits well down in the snowpack at TL locations and as high as 2700m.

Avalanche Summary

No patrol on Tuesday and nothing new reported. No new avalanches noted on Monday.

Confidence

The weather pattern is stable on Wednesday

Régions couvertes