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Avalanche Forecast

Archived

Apr 7th, 2025–Apr 8th, 2025

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

Regions

Little Yoho.

Cooler temperatures and overcast sky's are forecast for Tuesday, but pay attention to solar radiation. If the sun comes out, conditions could deteriorate quickly on solar aspects.

Confidence

Moderate

Avalanche Summary

No avalanches were observed or reported on Monday.

Snowpack Summary

Light wind effect in the alpine. On alpine north aspects 15-30 cm of dry settled snow sits over the Mar 27 crust that exists to ~2500 m. On solar aspects sun crusts are present to ridgetop with moist snow later in the day. A supportive surface crust exists in most places below treeline.

70-130 cm of firm snow sits over the Jan facet layer which remains a concern in thin areas. In deeper areas the lower snowpack is well consolidated. Treeline snowpack depths range from 150 to 250 cm.

Weather Summary

A slight cooling trend will bring temperatures back to seasonal norms, with valley highs just above 0°C and ridgetop temps near -10°C. Model guidance suggests up to 7 cm of snow overnight Tuesday, though totals may vary. Winds will be variable in direction, with potential for strong gusts.

Terrain and Travel Advice

  • Avoid steep, sun-exposed slopes when the air temperature is warm or when solar radiation is strong.
  • Start your day early and be out of avalanche terrain during the heat of the day.

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.