Eastern Alaska Range (Deltas)

Eastern Alaska Range Snow Observations

A small fraction of terrain frequented by backcountry travelers has a professional avalanche forecast available. For this reason, the Alaska Avalanche Information Center encourages users to share what they see.Deltas map

The Delta Range (Eastern Alaskan Range) accessed from the Richardson Highway between Paxson and Donnelly Dome is a fantastic winter playground.

Please contribute your avalanche, snow and weather observations in the comments below. Shared observations create an ongoing history of snow and weather that can help recreationists plan and prepare for success in the backcountry.
natalie ski summit lake
snowmachines near summit lake

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4 thoughts on “Eastern Alaska Range (Deltas)

  1. April 12, 2014 Report of a large slab release set off by a skier on Idem Peak up Trims creek. Two skiers caught but both OK.

  2. March 23, 2014 McCallum Creek drainage
    clear skies, high temp of +1C, calm-light variable wind
    Evidence of old avalanche cycle; many old wet/windslab avalanches to size 2 observed on steep west and south aspects above 3400′.
    Wind has blown the recent snow back down to rain runneled surface in many exposed areas. Some windslab collapsing and cracking under the weight of multiple skiers, but no movement.
    In McCallum Creek drainage we found 100cm snowpack. A thin windskin over 10cm of fist snow and a layer of surface hoar sitting above a knife crust. The midpack has several meltfreeze crusts interspersed with facets. The lower pack was pencil- facets. ECTP4 in facets just under a knife crust down 16cm.

    Stability: Good

  3. March 22, 2014 Knoll above Isabel Pass 3500′
    clear skies, -9C, calm, foot pen 40cm
    Wind affected surface snow. The most recent avalanche activity looked to be steep, pockets at ridgeline ~ triggered by the strong north wind March 20(?) One windslab avalanche was observed on a west aspect at about 4000′. Debris of older wet slab avalanches to destructive size 2.5 was seen on south and southwest aspects. A number of the old crowns were at about 4500′. Many released near the ground.

    We dug on both the north and south aspects of a small ridge at about 3500′. The snow structure was similar – lots of facets interspersed between several different melt freeze and ice crusts.
    The south aspect had considerably less snow <1meter. ECTP18 down 39cm sudden collapse in depth hoar to 4mm.
    The north aspect had more than 1 meter. The north side had received the most recent windload. We found surface hoar to 5mm just under a thin windskin. ECTP14 & RB6 (most of block) down 14cm resistant planar in 2mm facets.

    Powder was found on wind protected north aspects. Ski pen ~15cm.

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