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.

E.g., 07/25/2017
E.g., 07/25/2017
Date the advisory was published: Bottom Line
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December 18, 2016 at 6:58 am

Above treeline, overall MODERATE avalanche danger exists on all aspects.  Pockets of CONSIDERABLE danger may be encountered on E-SE-S facing slopes due to recent wind loading.

Near and below treeline, the avalanche danger remains LOW.  Wind slab avalanches, confined to alpine terrain, are the primary concern for today.  Human triggered avalanches are possible and could range from small to large in size. 

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December 17, 2016 at 6:35 am

MODERATE avalanche danger exists on all aspects above treeline.  Near and below treeline, the avalanche danger will be LOW today.  Wind slab avalanches, confined to specific features in alpine terrain, are the primary concern.  Above treeline, human triggered avalanches remain possible.  Near and below treeline, natural and human triggered avalanches are unlikely.

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December 16, 2016 at 6:52 am

Our recent wet and warm storm followed by cold temperatures has froze the snowpack well. Expect LOW avalanche danger below and near treeline and some remaining MODERATE danger above treeline. Lingering wind slabs are possible for human trigger. Watch for signs of wind slabs/wind pillows along ridgelines, near rock outcrops, on unsupported slopes and in narrow couloirs steeper than 37 degrees, all aspects. Further, steer clear of cornice formations along ridgelines.

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December 15, 2016 at 6:55 am

Mt Shasta has received 2 feet of new snow with strong SW wind in less that 48 hours. HIGH avalanche danger is expected for above treeline terrain today for wind and storm slab avalanches. Both natural and human triggered avalanches are likely. Below treeline, expect MODERATE danger and near treeline, CONSIDERABLE avalanche danger. As one gains elevation above the rain/snow level, the avalanche danger will increase. Don't let clearing skies this afternoon lure you onto unstable avalanche terrain.

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December 14, 2016 at 6:58 am

A winter storm is forecasted to bring high westerly wind and several feet of snow to above treeline terrain over the next two days. As the storm progresses, expect the avalanche danger to rise to CONSIDERABLE today above 7,000 feet. New wind slabs will gain size and depth throughout the day. Natural and human triggered avalanches are possible. The bottom line: New wind slab avalanche danger will rise as time goes by and backcountry skiers and riders increase elevation. 

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December 13, 2016 at 6:32 am

For today, LOW avalanche danger exists on all aspects and elevations.  Natural and human triggered avalanches are unlikely.  Watch for unstable snow on isolated terrain features steeper than 35 degrees where a lingering wind slab problem may pose risk to backcountry travelers.  Incoming storms will bring new snow and high winds to the advisory area this evening and throughout the rest of the week.  Be sure to watch for changing conditions and travel accordingly.

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December 12, 2016 at 6:54 am

Strong west/northwest winds have blown on Mt Shasta over the past four days.  MODERATE avalanche danger exists above treeline while the danger is LOW near and below treeline.  The primary avalanche concern for today is the wind slab problem.  Human triggered avalanches are possible, and the areas most suspect are slopes steeper than 35 degrees on N-NE-E-SE-S aspects above treeline.  Natural avalanches are unlikely.  Many slopes are scoured and icy making a slide for life possible as well. 

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December 11, 2016 at 6:55 am

Three days of strong west/northwest wind continues today on Mt Shasta. Expect overall MODERATE avalanche danger above treeline and LOW danger below treeline. Near treeline, LOW danger overall with pockets of MODERATE will exist. Aspects N-NE-E-SE-S facing and >37 degrees will be most suspect for triggering small to medium sized wind slabs. Other areas remain scoured and icy making the slide for life possible. Maintain sharp observational skills and safe backcountry travel techniques. 

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December 10, 2016 at 6:30 am

Wind slab avalanches are our primary avalanche problem. Below and near treeline, expect LOW avalanche danger due to warm temperatures and recent rain on snow. Above treeline, a human triggered old and/or new wind slab is possible and MODERATE danger will preside. Strong, westerly winds and 5-6 inches new snow could create new wind slabs on NE-E-SE slopes. Older slabs could be several feet thick. Use safe travel habits, careful snowpack evaluation and conservative decision making! 

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December 9, 2016 at 6:36 am

The avalanche danger will increase as one gains elevation today with wind slabs as our main avalanche problem. Overall, MODERATE avalanche danger exists in our forecast area. Above treeline on Mt Shasta, pockets of CONSIDERABLE danger are possible on W-NW-N-NE-E where recent, thick wind loading is observed on slopes steeper than 37 degrees. Below treeline, LOW avalanche danger prevails. Danger ratings could increase as additional snow and wind persist today.

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December 8, 2016 at 6:56 am

Steady, southerly wind and 5-7 inches of new snow overnight has created CONSIDERABLE avalanche danger near and above treeline on Mt. Shasta. Below treeline, expect overall MODERATE danger. Near and above treeline, recently formed wind and storm slabs on our old, smooth and firm snowpack will be encountered today and could be sensitive to trigger. Be extra cautious on W-NW-N-NE-E facing slopes steeper than 35 degrees. 

 

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December 7, 2016 at 7:01 am

TODAY... LOW avalanche danger and normal caution advised. Be cautious of firm, icy and smooth snow surface conditons above treeline. 

An incoming storm this afternoon will bring a couple inches of new snow with gradually increasing southwest/west wind. Newly formed wind slabs on our firm, icy, old-snow surface is likely. This is expected to increase the avalanche hazard. Always check the forecast before heading into the backcountry!  

Shallow buried objects still exist in some locations within the forecast area.

 

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December 6, 2016 at 6:43 am

LOW avalanche danger continues for all aspects and elevations today. Normal caution is advised. Watch out for shallow buried objects in some areas.

Strong northwest wind has scoured the snowpack and created firm snow conditions above treeline on Mt Shasta. A slip and fall on a steep slope without self arrest could result in a long slide for life.  Ice axe, crampons and a helmet are recommended for travel on above treeline, steep slopes.

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December 5, 2016 at 6:41 am

LOW avalanche dangers continues for all aspects and elevations today. Strong northwest wind has scoured the snowpack and created firm snow conditions above treeline on Mt Shasta. A slip and fall on a steep slope without self arrest could result in a long slide for life.  Ice axe, crampons and a helmet are recommended for travel on above treeline, steep slopes. The west side of the forecast area hosts a shallow snowpack with rock and manzanita avoidance skills mandatory. 

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December 4, 2016 at 7:07 am

For today, LOW avalanche danger allows for normal caution for backcountry users within the forecast area. Don't let your antenna down however. Lower elevations still host shallow buried objects.  Steep slopes at higher elevations on Mt Shasta could also provide for a slide for life without proper self-arrest as smooth and firm snow conditions exist. Always practice safe backcountry travel habits.

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December 3, 2016 at 6:20 am

Today, LOW avalanche danger will preside over the forecast area. Normal caution is advised for backcountry travel. Always be on the watch for unstable snow on isolated terrain features. Smooth, firm and wind scoured snow exists above treeline on Mt Shasta. A slip and fall on a steep slope could result in a slide for life without proper ice axe, crampon and self arrest skills. Be prepared and know how to use the equipment properly.

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December 2, 2016 at 6:24 am

Today, LOW avalanche danger will preside over the forecast area. Normal caution is advised for backcountry travel. Always be on the watch for unstable snow on isolated terrain features.

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December 1, 2016 at 6:59 am

LOW avalanche danger prevails for all aspects and elevations in the forecast area. An isolated, small and stubborn to trigger wind slab could potentially be encountered near and above treeline along a ridgeline, chute, convexity or rock outcrop. Overall, normal caution is advised for travel on Mt Shasta. Watch out for shallow buried objects in other locations within the forecast area, west of I-5.

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November 28, 2016 at 10:37 am

The Mt Shasta Avalanche Center is eagerly awaiting the 2016-2017 winter season.  We will begin issuing daily avalanche advisories beginning December 1st. Thanks for your support and we are looking forward to a bountiful winter!

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November 23, 2016 at 11:12 am

The Mt Shasta Avalanche Center is eagerly awaiting the 2016-2017 winter season. Today, 11/23/16, the mountain received 9 inches of snow overnight and more expected Friday-Sat. Strong southerly winds, averaging 10-20 mph and gusting to 35-45 mph could create new wind and storm slabs on the mountain, above tree line. Shallow buried objects still pose a hazard below tree line with 22 inches at Bunny Flat.  We will begin issuing daily avalanche advisories in December.  

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