Avalanche Forecast

Archived

Apr 10th, 2019–Apr 11th, 2019

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Alpine

Below Threshold.

Treeline

Below Threshold.

Below Treeline

Below Threshold.

Regions

Little Yoho.

Good spring skiing conditions continue for those willing to walk high enough to escape the surface crusts. Short bursts of convective snow showers can add up and make for good powder skiing on north facing slopes in April.

Weather Forecast

An unsettled NW flow has established itself over the region and will make for a mixed week. Thursday looks to be a mix of clear skies with possible convective snow showers in the afternoon but no significant accumulation. Temps ranging from -6 to +2 and freezing levels to 2000m. 5-10 cm possible for Friday.

Snowpack Summary

5-10 cm of new snow by Wed morning has melted at low elevations and made for about 30 cm of dry powder on high elevation north aspects. This snow is well settled and bonded to the underlying layers. Surface crusts exists on most aspects and elevations in the morning, deteriorating by noon. Facets exist in the upper snowpack on high north aspects.

Avalanche Summary

No new avalanches observed or reported today. A small windslab was triggered in a cross loaded slope under the Granddaddy Couloir on Tuesday.

Confidence

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.