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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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March 5, 2018 at 7:01 am

Human triggered wind slab avalanches are possible on S-SE-E-NE-N aspects near and above treeline. Increasing westerly winds may create fresh wind slabs in leeward terrain. MODERATE avalanche danger exists near and above treeline while the danger is LOW below treeline. A rapid warm up today may create the potential for wet loose avalanches on steep sun exposed slopes.

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March 4, 2018 at 7:00 am

Wind slabs several feet thick have recently formed on N-NE-E-SE-S aspects near and above treeline. Storm slabs remain a concern as the snowpack adjusts to the weight of the new snow. CONSIDERABLE avalanche danger exists above treeline while the danger is MODERATE near and below treeline.

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March 3, 2018 at 6:02 am

A WINTER WEATHER ADVISORY is in effect from 4 AM until 10 PM PST this evening for Mount Shasta.  CONSIDERABLE avalanche danger exists near and above treeline today due to touchy wind slab and/or cornice fall avalanche problems. An additional round of snowfall will continue to impact mountinous terrain. Avoid slopes steeper than 30 degrees without exposure to steeper terrain above.

 

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March 2, 2018 at 6:23 am

A WINTER STORM WARNING issued by the NWS Medford continues and is in effect until 4 AM PST Saturday. Wind slabs, storms slabs and/or cornice fall avalanche problems are likely. Travel in or below avalanche terrain is not recommended. If you are able to make it into the backcountry today, travel on slopes less than 30 degrees without expsoure to steeper terrain above. Poor visibility could make navigation difficult. 

 

 

 

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March 1, 2018 at 6:28 am

A WINTER STORM WARNING is in effect until 7 AM PST Saturday.

Over the next 48 hours, feet of new snow and high winds will create new wind slab, storm slab and cornice fall avalanche problems. Travel in avalanche terrain is not recommended. Natural avalanches are possible and human triggered avalanches are likely.

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February 28, 2018 at 6:18 am

Avalanche danger will be LOW today at all elevations but will rise to MODERATE tonight as a winter storm begins to impact the area with high winds and significant snowfall. Recent wind slabs may be found on isolated terrain with S/SE aspects. Ridgelines, start zones, and the tops of moraines are icy and exposed. Tonight new wind slabs will begin to form on NW/N/NE aspects near and above treeline.

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February 27, 2018 at 6:40 am

The avalanche danger is MODERATE near and above treeline where fresh wind slabs 1-2 feet thick have formed on W-SW-S-SE-E aspects. Wind slabs will grow in size and distribution today with continued northerly winds. Human triggered wind slab avalanches are possible while natural avalanches are unlikely. Below treeline, the avalanche danger is LOW.

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February 26, 2018 at 6:38 am

Fresh wind slabs 1-2 feet thick may exist on SW-S-SE-E-NE aspects near and above treeline. Human triggered wind slab avalanches are possible while natural avalanches are unlikely. The avalanche danger is MODERATE near and above treeline and LOW below treeline.

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February 25, 2018 at 7:00 am

The wind slab problem is developing near and above treeline on S-SE-E-NE-N aspects. Fresh wind slabs will continue to grow in size and distribution with the small incoming storm over the next 24 hours. Expect increasing avalanche danger tomorrow. For today, avalanche danger will remain LOW for all elevations.

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February 24, 2018 at 6:27 am

The avalanche danger is LOW. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Fresh wind loading may occurr over the next 48 hours due to new snow and northwest winds. Pay attention to changing conditions. Watch for unstable snow on isolated terrain features.

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February 23, 2018 at 6:43 am

Wind slabs are the main avalanche problem of concern today. MODERATE avalanche danger will exist for most aspects and elevations of the forecast area. CONSIDERABLE avalanche danger may develop near treeline and above treeline on primarily east and southeast facing slopes due to new snow and wind.

Firm, icy ridgelines and shallow snowpack hazards still exist. 

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February 22, 2018 at 5:54 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Minor wind loading will occurr on S-SE-E aspects between 7,500-9,000 ft. Watch for unstable snow on isolated terrain features.

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February 21, 2018 at 6:36 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Minor wind loading has occurred on S-SE-E aspects between 7,500-9,000 ft. Watch for unstable snow on isolated terrain features.

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February 20, 2018 at 7:00 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Minor wind loading has occurred on S-SE-E aspects between 7,500-9,000 ft. Watch for unstable snow on isolated terrain features.

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February 19, 2018 at 6:47 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Arresting a fall in these conditions would be difficult. Dangerously cold temperatures will continue today and tonight.

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February 18, 2018 at 7:00 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. An incoming storm today will bring dangerously cold temperatures, light snowfall and gale-force winds out of the northwest. Whiteout conditions are expected on Mount Shasta by this afternoon.

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February 17, 2018 at 5:32 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Icefall and rockfall may be encountered above 11,000 ft. Windy cold weather with a chance of snow will begin tonight. Be prepared.

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February 16, 2018 at 5:10 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Icefall and rockfall may be encountered above 11,000 ft on Mount Shasta.

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February 15, 2018 at 5:53 am

Avalanche danger is LOW and NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Icefall and potentially rockfall is a concern above 11,000 ft on Mount Shasta. 

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February 14, 2018 at 5:08 am

Avalanche danger is LOW. NORMAL CAUTION is advised. Firm and icy snow surfaces are widespread and shallow snowpack hazards exist. Icefall is a concern above 10,000 ft on Mount Shasta.

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