Dashboard Regions Weather Stations Radar Alerts Glossary
Contact About
Log In

Register for an account and never miss a forecast again!

Register

Avalanche Forecast

Archived

Mar 10th, 2025–Mar 11th, 2025

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

Regions

Sea To Sky, Brandywine, Garibaldi, Homathko, Spearhead, Tantalus.

Human-triggered avalanches are likely.

Careful snowpack evaluation, cautious route-finding, and conservative decision-making are essential.

Confidence

Moderate

Avalanche Summary

On Sunday, numerous natural and human-triggered storm slab avalanches were reported up to size 3. Storm slab avalanches were reported at all elevations.

Storm slabs continue to be touchy on Tuesday. Dry loose sluffing will be likely from steep terrain features.

Snowpack Summary

Up to 110 cm of storm snow blankets the region. Strong southwest winds have redistributed storm snow into deep pockets on lee slopes at the ridgeline. Storm snow covers a crust on all aspects except on high north facing terrain, where new snow buries 10 to 15 cm of snow overlying a crust from earlier in March.

A layer of facets and surface hoar from mid February can be found down 100 to 140 cm.

Another layer of facets and surface hoar from late January can be found down 150 to 200 cm.

The lower snowpack contains several crusts that are not concerning.

Weather Summary

Monday Night

Cloudy with flurries up to 5 cm. 25 to 45 km/h southwest ridgetop wind. Treeline temperature -7 °C. Freezing level valley bottom.

Tuesday

Cloudy with 5 to 10 cm of snow. 20 to 45 km/h south ridgetop wind. Treeline temperature -3°C. Freezing level 1200 m.

Wednesday

Cloudy with 8 to 15 cm of snow. 20 gusting to 65 km/h south ridgetop wind. Treeline temperature -5 °C. Freezing level around 1100 m.

Thursday

Mix of sun and cloud with light flurries. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -6 °C. Freezing level valley bottom.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Keep your guard up at lower elevations. Storms slabs have been reactive at all elevations.
  • Avoid freshly wind-loaded terrain features.
  • Storm slabs in motion may step down to deeply buried weak layers and result in very large avalanches.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.

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.