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Avalanche Forecast

Archived

Apr 27th, 2023–Apr 30th, 2023

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

Waterton Lakes, Waterton.

Very warm temps will increase avalanche hazard over the weekend. Large avalanches that run to valley bottom are possible, consider what's above you when travelling in avalanche terrain. Even snow-free areas may be impacted by large avalanches.

Confidence

Moderate

Avalanche Summary

Earlier this week a small wet loose cycle occurred in the new surface snow. Avalanches to size 2 were observed on all aspects.

Snowpack Summary

Very warm daytime temps and limited overnight refreezes will keep the snowpack isothermal on all aspects at all elevations. The January melt-freeze crust is buried up to 100cm. Alpine and Treeline midpack is well settled and overlies basal facets and depth hoar. Most places the snowpack is now moist to ground.

Weather Summary

Friday-Sunday

Temps are forecast to get un-seasonably hot over the weekend. Alpine temps up to +15 will be possible. Skies are forecast mostly clear with no precip expected. Winds will be light to moderate.

For more weather information check the mountain weather forecast

Terrain and Travel Advice

  • Avoid steep slopes when air temperatures are warm, or solar radiation is strong.

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.