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Archived Avalanche Advisories from the Mount Shasta Avalanche Center

Use this page to view archived advisories. The table below shows the overall danger rating and the bottom line for the 20 most recent advisories. Click on the time and date link above each danger rating icon to view the full advisory for that day. Use the date chooser or the pager at the bottom to scroll through the older advisories.

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Date the advisory was published: Bottom Line
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January 24, 2018 at 7:00 am

The avalanche danger will rise to CONSIDERABLE above treeline by this afternoon. Fresh wind slabs will form near and above treeline on SE-E-NE-N-NW aspects. Natural avalanches are possible and human triggered avalanche are likely. Heightened avalanche danger is expected through the end of the week as an active weather pattern continues.

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January 23, 2018 at 6:53 am

The avalanche danger is LOW at all elevations. Shallow wind slabs still exist on S-SE-E-NE-N aspects above 9,000 ft on Mount Shasta. Expect increasing avalanche danger tomorrow through the end of the week as a significant winter storm impacts the area.

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January 22, 2018 at 6:52 am

MODERATE avalanche danger exists near and above treeline. Fresh wind slabs are a concern on S-SE-E-NE-N aspects above 8,000 ft. Human triggered avalanches are possible while natural avalanches are unlikely. The avalanche danger is LOW below treeline. 

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January 21, 2018 at 7:01 am

MODERATE avalanche danger exists near and above treeline. Watch for fresh wind slabs above 8,000ft on S-SE-E-NE-N aspects. A winter storm will begin this morning and avalanche danger is expected to rise this afternoon and by tomorrow. Monitor changing conditions throughout the day.

 

 

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January 20, 2018 at 6:03 am

MODERATE avalanche danger exists for the wind slab problem on Mount Shasta today. Human triggered wind slabs will be stubborn to trigger, but are possible. Expect wind slabs specifically on N-NE-E-SE facing slopes above 9,000 feet. For all other aspects and elevations, the avalanche danger is LOW. Firm, icy surfaces exist on windward, exposed ridgelines and a slide for life is possible without immediate self-arrest. Watch for falling rime ice.

 

 

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January 19, 2018 at 6:44 am

The wind slab problem will continue due to strong westerly winds and new snow over the past 24 hours. Near and above treeline, MODERATE avalanche danger exists on leeward, wind loaded N-NE-E-SE facing slopes. A human triggered wind slab is possible today, especially on unsupported slopes steeper than 35 degrees. Below treeline, the avalanche danger is LOW. 

Icy surfaces still exist on windward, exposed ridgelines and a slide for life is possible without immediate self-arrest. 

 

 

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January 18, 2018 at 6:38 am

A winter storm will impact the area over the next 36 hours. The avalanche danger is LOW this morning, but will rise to MODERATE this afternoon as new snow and wind create fresh wind slabs near and above treeline on Mount Shasta. Pay attention to changing conditions today. Below treeline, LOW avalanche danger will continue.

 

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January 17, 2018 at 6:16 am

Avalanche danger is LOW. Isolated wind slabs may be encountered on NE-E-SE aspects above 9,000 ft. Monitor changing conditions as a new storm moves in after 4 p.m.

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January 16, 2018 at 7:00 am

The avalanche danger is LOW. Shallow wind slabs may have recently formed on N-NE-E-SE-S aspects above 9,000ft on Mount Shasta. Expect a break today and tomorrow before the active weather pattern returns Thursday.

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January 15, 2018 at 7:00 am

LOW avalanche danger and generally safe avalanche conditions exist. Shallow snowpack hazards are still problematic. A series of storms beginning tonight will bring changing conditions throughout the week.

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January 14, 2018 at 6:43 am

LOW avalanche danger exists at all elevations. Falling rime ice will be a significant hazard above treeline on Mount Shasta today. A series of storms beginning tomorrow night will bring snowfall and changing conditions throughout the week.

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January 13, 2018 at 5:31 am

Triggering an avalanche is unlikely, and LOW avalanche danger exists at all elevations. Watch for unstable snow on isolated terrain features. Shallow snowpack hazards are still problematic below treeline. Use extreme caution on steep slopes at upper elevations where firm snow surfaces are widespread. Falling rime ice will be a serious hazard today with warming temperatures.

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January 12, 2018 at 6:32 am

LOW avalanche danger exists at all elevations. Isolated wind slabs may exist above 9000 ft on N-NE-E-SE-S aspects. Be aware of falling rime ice. Wear a helmet. Smooth, firm snow surfaces exist on some slopes. A long slide is possible without immediate self arrest. Know how to use your ice axe and crampons.

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January 11, 2018 at 6:26 am

LOW avalanche danger exists at all elevations. Isolated wind slabs may exist above 9000 ft on N-NE-E-SE-S aspects. Be aware of falling rime ice. Wear a helmet. Smooth, firm snow surfaces exist on some slopes. A long slide for life is possible without immediate self arrest. Know how to use your ice axe and crampons.

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January 10, 2018 at 6:24 am

LOW avalanche danger exists at all elevations. Isolated wind slabs may exist above 9000 ft on N-NE-E-SE-S aspects. Be aware of falling rime ice.

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January 9, 2018 at 7:00 am

MODERATE avalanche danger exists above treeline, while the avalanche danger is LOW near and below treeline. New snow accompanied by continued southerly winds have recently formed wind slabs above 8,000ft on N-NE-E-SE aspects. In these specific areas, wind slabs will be sensitive to human triggering.

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January 8, 2018 at 6:59 am

The avalanche danger will rise to MODERATE above treeline by this afternoon. Strong southerly winds and heavy snowfall are expected over the next 24 hours. Human triggered wind slab avalanches will be possible on steep, recently wind loaded slopes above 8,000ft on Mount Shasta. LOW avalanche danger exists near and below treeline.

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January 7, 2018 at 7:01 am

LOW avalanche danger exists at all elevations. Isolated pockets of shallow wind slab may exist in leeward terrain above 9,000ft. Watch for falling rime ice if you venture into the high alpine on Mount Shasta today.

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January 6, 2018 at 6:24 am

Above treeline on Mount Shasta, the avalanche danger is MODERATE. Human triggered wind slab avalanches are possible on steep, recently wind drifted slopes, primarily above 9,000 feet. Natural avalanches are unlikely.

 Near and below treeline offers LOW avalanche danger with shallow snowpack hazards.

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January 5, 2018 at 6:57 am

Above treeline on Mount Shasta, the avalanche danger is MODERATE. Human triggered wind slab avalanches are possible on steep, recently wind drifted slopes. Watch out for icy patches in select areas on the upper mountain. Near and below treeline offers LOW avalanche danger with shallow snowpack hazards.

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