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Avalanche Forecast

Archived

Apr 29th, 2021–Apr 30th, 2021

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

Glacier.

The avalanche hazard will be elevated today with no overnight freeze, warm temperatures, and rain!

Bears are waking up too, and have been observed at lower elevations.

Weather Forecast

Conditions will be warm, wet, and probably windy today as a warm front pushes past Rogers Pass on a NE trajectory. Freezing levels are forecast to reach 3000m today, winds will moderate from the SW gusting strong, and we could see up to 5mm of rain at lower elevations. Temperatures will decrease to 2000m overnight, and stay there for a few days.

Snowpack Summary

The snowpack has undergone numerous melt-freeze cycles resulting in several crusts in the upper snowpack on all but high (>2400m) N aspects, where one can still find loose, dry snow. Check out this link for more info on spring conditions. Expect the forecasted rain and warm temperatures to continue to destabilize the snowpack.

Avalanche Summary

Natural avalanche activity will increase today with rising temperatures, no overnight refreeze, and rain penetrating the snowpack. Cornices and Glide avalanches have been a common occurrence recently; however, we'll likely see some loose wet avalanches at lower elevations in steep unsupported terrain features.

Confidence

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.