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 25th, 2025–Mar 26th, 2025

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

Regions

Little Yoho.

Climbing freezing levels and rainfall are driving HIGH avalanche danger. Steer clear of avalanche terrain until the storm passes and conditions stabilize.

Confidence

Low

Avalanche Summary

No avalanches were observed or reported in Little Yoho, but we are on the cusp of another cycle due to warming and rain.

Snowpack Summary

15-20 cm of heavy moist snow has been blown into windslabs up to 40 cm deep in leeward areas at treeline and in the alpine. This adds to the dense slab, 70-100 cm thick, overlying a 20-30 layer of faceted crystals. We have no recent snowpack tests to confirm the strength of this layer in Yoho, but in thicker snowpack regions such as here, the facet/depth hoar basal layer is less prominent than it is east of the divide.

Weather Summary

Freezing levels are rising, with moderate precipitation expected to bring another 10 cm of snow by Wednesday morning. Rain is likely at lower elevations. Winds will be variable and somewhat unpredictable, potentially reaching strong speeds from the southwest. Taken together, these factors point toward an avalanche cycle.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Be careful as you transition into wind-affected terrain.

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.

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.