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Avalanche Forecast

Archived

Mar 21st, 2024–Mar 22nd, 2024

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

South Okanagan, Shuswap, North Okanagan.

Cooling temperatures are reducing the likelihood of triggering large persistent slab avalanches.

Avoid steep or convex terrain features with a shallow or thin-to-thick snowpack.

Confidence

High

Avalanche Summary

No new avalanches were reported on Wednesday, but data is very limited in this region.

If you go out into the backcountry, please consider posting your observations on the Mountain Information Network.

Snowpack Summary

0 to 5 cm of new snow overlies predominantly crusty surfaces.

A widespread, hard crust down 40 - 130 cm with weak facets above continues to be the primary layer of concern for human triggering of very large persistent slab avalanches.

Weather Summary

Thursday night

Partly cloudy. 10 to 20 km/h north ridgetop wind. Treeline temperature -2 °C. Freezing level 1100 m.

Friday

Mix of sun and cloud. 10 to 20 km/h variable directions ridgetop wind. Treeline temperature 2 °C. Freezing level 2000 m.

Saturday

Cloudy. 10 to 20 km/h east ridgetop wind. Treeline temperature -1 °C. Freezing level 1700 m.

Sunday

Sunny. 20 to 30 km/h north ridgetop wind. Treeline temperature -4 °C. Freezing level 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Avalanche hazard may have improved, but be mindful that deep instabilities are still present.
  • Cornice failure may trigger large avalanches.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.