Lawinenlagebericht

Mount Shasta

Mount Shasta Avalanche Center
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Lawinengefahr

Sat
Hochgebirge
4 · Gross
Waldgrenze
4 · Gross
Unterhalb
4 · Gross
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Veraltet — dieser Lagebericht ist 8 months ago abgelaufen. Du siehst vergangene Verhältnisse, nicht den aktuellen Bericht.

Kernpunkte

Multiple feet of new snow and strong winds have created very dangerous avalanche conditions. Large avalanches could occur in both windy and sheltered terrain. Travel in, near, or beneath steep slopes is not recommended - including below treeline in Avalanche Gulch and the Old Ski Bowl. Know where you are within the terrain. 

Lawinenprobleme

  • Storm Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Very Likely
    Größe
    2–3.5

    Slabs multiple feet thick have formed below, near, and above treeline. Southerly winds have loaded new snow onto leeward terrain such as below ridgelines and in gullies, primarily on west through north through east aspects. Although slabs are deepest in wind-loaded terrain, unstable snow may exist on all aspects and at all elevations.

    Avalanches could release on density changes within the new snow, or on deeper layers in the snowpack. There remains some uncertainty regarding the sensitivity of these slabs to natural and human-triggered releases. However, storm cycles like this have produced very large, full-path avalanches in popular recreation areas on the south side of Mount Shasta, including Avalanche Gulch and the Old Ski Bowl. Know where you are going if traveling in the backcountry.  Travel in, near, or below steep slopes is not recommended today. Give the new snow time to settle before heading into steep terrain.

    There are opportunities for recreation in non-avalanche terrain on slopes below 30 degrees and not underneath or adjacent to steeper terrain. Careful route planning is essential. 

Avalanche Discussion

An Avalanche Warning is in effect until 4pm this afternoon. It's officially winter, and the mountain is finally looking the part. There are over four feet of snow at the Old Ski Bowl (7,600 feet) with more on the way today. The snowpack below treeline is becoming usable for winter recreation, though some shallowly buried obstacles remain. On the west side of the forecast area, most terrain lacks a usable snowpack: about 16 inches covers the ground at the Mount Eddy weather station (6,700 feet), and 6 to 12 inches at Castle Lake (5,400 feet). A final round of precipitation and colder temperatures today will help build a base.

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