Avalanche Forecast

Issued: Mar 22nd, 2022 4:00PM

The alpine rating is moderate, the treeline rating is moderate, and the below treeline rating is moderate. Known problems include Wind Slabs, Cornices and Loose Wet.

Timothy Johnson,

Email

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.

Summary

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

Problems

Wind Slabs

An icon showing 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

An icon showing 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

An icon showing 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

Valid until: Mar 23rd, 2022 4:00PM