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Avalanche Forecast

Archived

Mar 31st, 2022–Apr 1st, 2022

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

Regions

Sea To Sky.

Cold, winter snow may still be found in north facing terrain in the high alpine. Supportive crust everywhere else. Assess big alpine lines for windslab hazard before choosing to ride them. 

Confidence

High - We have a good understanding of the snowpack structure and confidence in the weather forecast

Weather Forecast

THURSDAY NIGHT: Cloudy. Very light snow/rain expected. Light southwest ridgetop wind, trending to northwest at higher elevations. Freezing level falling to around 750 m. 

FRIDAY: Mostly cloudy. 1-4 cm of snow expected. Light southwest ridgetop wind trending to strong at high elevations. Freezing level rising to 1300 m through the day.

SATURDAY: Mostly cloudy with a sunny break mid-day. 3-10 cm of snow expected overnight, with the highest amounts being around Squamish. Light snow/rain through the day. Light southwest ridgetop wind trending to moderate west at high elevations. Freezing level falling to 800 m overnight, back up to 1300 m through the day.

SUNDAY: Cloudy. Moderate to heavy snow/rain expected. Up to 40 cm above treeline. Moderate south ridgetop wind, trending to extreme southwest at high elevations. 

Avalanche Summary

No new avalanches were reported on Thursday before 4 pm. 

On Wednesday, in the Blackcomb backcountry, two avalanches were reported on north aspects in the alpine: a small, rider triggered windslab, and a large, natural cornice failure that didn't trigger an avalanche on the slope below.

Snowpack Summary

Supportive surface crust on all aspects into the alpine. On the highest peaks, above 2200 m, cold, winter snow may be found in shaded alpine terrain. Small, reactive windslabs on isolated, high alpine features.

The rest of the upper snowpack consists of a number of crust/facet/surface hoar interfaces buried in March that seem to have bonded during the recent warm weather. 

The mid and lower snowpack are generally strong and well bonded. 

Terrain and Travel

  • Make observations and assess conditions continually as you travel.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

Problems

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.