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Avalanche Forecast

Archived

Apr 2nd, 2025–Apr 3rd, 2025

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

Glacier.

Spring-time usually brings a wide array of conditions, from bullet-proof crusts in the valley bottom, horrible travel in tight trees, and glorious powder on N-facing alpine slopes.

This year is no exception.

Expect conditions to change rapidly as the sun strikes the mountains. Get an early start and finish early!!

Confidence

No Rating

Avalanche Summary

A field team was able to ski cut a sz 1.5 wind slab from an alpine lee feature on Christiana Ridge Wednesday.

Sunday and Monday saw minor loose/wet avalanche cycles on steep solar aspects, with several sz 3 slides reaching snowsheds.

The March 27th crust has added strength to the snowpack but expect natural activity to pick back up during sunny periods or if freezing levels are higher than forecast.

Snowpack Summary

10-20cm of dry powder exists on northerly aspects in the alpine. Solar aspects sport a crust with ~5cm new snow on top.

Below this surface snow, a 10-25cm thick crust of variable strength from last week's rain event is present. Test results have varied on this crust, from no result to moderate failures.

Below 2300m, up to 50cm of moist snow can be found under this crust. If an avalanche digs below this crust, it may entrain large wet, loose avalanches.

Weather Summary

Flurries on Thurs, then clearing and rising temps for the weekend.

Tonight cloudy with clear periods, isolated flurries. Trace to 5cm. Alp low -10°C. Ridge wind NW 20km/h. Freezing Level (FZL) 800m

Thurs Mix of sun/cloud. Alp high -6°. Wind N 15km/h. FZL 1600m.

Fri Sunny with cloudy periods. Alp high -3°C. Light wind. FZL 2000m.

Sat Sunny. Alp high 0°C. Light ridge wind. FZL 2200m.

Terrain and Travel Advice

  • Back off slopes as the surface becomes moist or wet with rising temperatures.
  • Avoid freshly wind-loaded features, especially near ridge crests, rollovers, and in steep terrain.
  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.

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.

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.