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Archived

Avalanche Forecast

Mar 22nd, 2022–Mar 23rd, 2022
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Jasper.

Watch out for the poor overnight freeze Tuesday evening. Snow and strong winds are expected for Wednesday evening. If the storm comes in early or you are out late the hazard could be greater than what is reflected in the bulletin.

Weather Forecast

Wednesday

Flurries.

Accumulation: 6 cm.

Alpine temperature: High -1 C.

Ridge wind southwest: 20 km/h gusting to 60 km/h.

Freezing level: 2000 metres.

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -11 C, High -7 C.

Ridge wind west: 10-30 km/h.

Freezing level at valley bottom.

Snowpack Summary

There is a 1-5cm breakable temperature crust on all aspects below 1700m. Also a sun crust on solar aspects to at least 2100m. The midpack is mostly solid but there could be a Feb 13 interface down 20-50cm as a suncrust on solar aspects and a facet layer on polar aspects.

Avalanche Summary

No new recent avalanches have been observed around Jasper

Confidence

Timing of incoming weather systems is uncertain on Wednesday

Avalanche Problems

Wind Slabs

Increasing winds and snow will build new wind slabs in the alpine and possibly down into exposed tree line.

  • Be careful with wind loaded pockets while approaching and climbing ice routes.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Cornices

Be mindful of what is above you during periods of warm temperatures and poor overnight freezes.

  • Cornices become weak with daytime heating.
  • Avoid slopes when the solar radiation is strong, especially if they have large cornices overhead.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3

Loose Wet

Expect small wet loose avalanches in steep terrain with increasing temperatures.

  • Use caution above cliffs and terrain traps where small slab avalanches may have severe consequences.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 1.5