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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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April 15, 2018 at 5:02 am

The Mount Shasta Avalanche Center has closed its doors for the 2017-2018 winter season. We will resume issuing daily avalanche advisories in the fall of 2018.

The climbing rangers will be updating the Overall Climbing Conditions and Climbing Route webpages throughout the 2018 climbing season. Avalanche activity will likely continue to occur this spring throughout the advisory area. For an overview of the most common springtime avalanche concerns, please read the full spring avalanche statement below.

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April 14, 2018 at 5:47 am

LOW danger exists for all aspects and elevations. Normal caution is advised. Watch for falling rime ice off exposed cliffs on the upper mountain, especially in the Helen Lake, Trinity Chutes, Redbanks areas. Smooth, firm snow surfaces provide the chance for a long slide for life on many routes currently. Climb and descend with care, know how to use your ice axe and crampons, wear a helmet. Be prepared for any type of weather in the springtime.

 

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April 13, 2018 at 5:39 am

Today, LOW avalanche danger exists below treeline. Near and above treeline, MODERATE danger remains due to the wind slab avalanche problem. Sun-exposed slopes may see some small, loose wet instabilities this afternoon. Ridgelines and any other areas scoured to the old snow surface will be slick and firm. Wear a helmet to protect from falling rime ice off the upper mountain.

 

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April 12, 2018 at 5:47 am

Evaluate snow and terrain carefully today. Since yesterday afternoon, Mount Shasta has received nine inches of new snow accompanied by strong SW to NW winds. New snow sits on top of old, smooth, icy surfaces. Fresh wind slabs and loose dry avalanches are possible today. As visibility is gained above treeline, travel through avalanche terrain with caution.

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April 11, 2018 at 6:31 am

Over a foot of snow is possible in the next 24 hours. Existing smooth firm snow could provide ideal bed surfaces for wind slab and loose dry avalanches. Avalanche danger will rise to CONSIDERABLE above treeline and MODERATE near and below treeline. Evaluate snow and terrain carefully today. Human triggered avalanches are likely and natural avalanches are possible.

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April 10, 2018 at 6:33 am

A weak frontal system may bring a few inches of snow at elevations above 8000 ft leading to the formation of small wind slabs. Avalanche danger will rise to MODERATE late this afternoon above treeline. Avalanche danger is LOW at all other elevations. Be prepared for smooth icy snow surfaces and gale force winds.

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April 9, 2018 at 7:01 am

Rapid warming and intense solar radiation will create the potential for triggering wet loose avalanches and small cornices. Rime icefall in upper elevation terrain on Mount Shasta will be a significant concern. Avoid traveling in avalanche terrain when snow surfaces are wet and unsupportable.

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April 8, 2018 at 7:01 am

The avalanche danger is LOW for all elevations. Watch for isolated wind slabs in steep leeward terrain at upper elevations on Mount Shasta. Rain on snow up to 10,000 ft Friday was followed by cold temperatures and strong southerly winds yesterday. A supportable rain crust now caps snow surfaces near and above treeline creating very slick and icy conditions.

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April 7, 2018 at 6:50 am

Despite several inches of water over the past 48 hours, the avalanche danger remains LOW for all aspects and elevations. Normal caution is advised but continue to watch out for isolated wind slabs well above treeline, in alpine areas above 10,000 feet. Overall, the wet and warm nature of this storm followed by cooling temperatures today will keep natural and human triggered avalanches unlikely.

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April 6, 2018 at 6:35 am

Heavy rain-on-snow and strong winds will impact Mount Shasta today. Expect rising avalanche danger as one gains elevation above the rain/snow line. Above treeline, MODERATE danger is possible this afternoon, rising to CONSIDERABLE danger tonight. For all other areas that receive rain on snow, the avalanche danger is LOW. Minor loose wet instabilities are possible, but not expected to be a serious problem. 

 

 

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April 5, 2018 at 6:43 am

A significant storm is expected to bring over 2 inches of water to the forecast area by early Saturday morning. Below and near treeline elevations will receive this in the form of rain and wet snow. Avalanche danger will rise from LOW to MODERATE above treeline by late tonight as new snow and strong winds combine to form wind slabs. Avalanche danger is LOW at all other elevations.

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April 4, 2018 at 6:15 am

Avalanche danger is LOW at all elevations. Watch for wet loose instabilities and falling rime ice during periods of intense solar radiation. An atmospheric river event will bring significant rain to the region starting tomorrow night.

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April 3, 2018 at 7:01 am

Although strong southwest winds will likely keep snow and ice firm and frozen today, continue to watch for wet loose instabilities and falling rime ice during periods of intense solar radiation. A potent storm series will bring a return to winter late in the week.

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April 2, 2018 at 6:54 am

The avalanche danger is LOW at all elevations and NORMAL CAUTION is advised. Watch for slick snow surfaces and falling rime ice in alpine terrain on Mount Shasta.

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April 1, 2018 at 6:39 am

The avalanche danger is LOW at all elevations and NORMAL CAUTION is advised. Watch for falling rime ice and slick snow surfaces in alpine terrain on Mount Shasta. Increasing cloud cover and strong north winds may create challenging climbing conditions on the upper mountain this afternoon.

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March 31, 2018 at 5:37 am

The avalanche danger is LOW at all elevations and aspects. Exercise normal caution. Watch for small, isolated wind slabs above treeline and loose wet activity near and below treeline. Be wary of falling rime ice on the upper mountain. 

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March 30, 2018 at 5:54 am

Avalanche danger is LOW at all elevations and aspects. Melt-freeze cycles are in the making. Exercise normal caution and watch for small, isolated wind slabs above treeline and loose wet activity near and below treeline. Be wary of falling rime ice on the upper mountain. 

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March 29, 2018 at 5:34 am

Avalanche danger is LOW at all elevations and aspects. Melt-freeze cycles are in the making. Exercise normal caution and watch for small, isolated wind slabs above treeline and loose wet activity near and below treeline. Be wary of falling rime ice on the upper mountain. 

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March 28, 2018 at 5:19 am

Avalanche danger is LOW at all elevations. Melt-freeze cycles have begun. Exercise normal caution and watch for small isolated wind slabs above treeline and loose wet activity near and below treeline. Be wary of falling rime ice.

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March 27, 2018 at 6:12 am

Avalanche danger is LOW at all elevations. Warming weather will cause snow surfaces to transition today. Exercise normal caution and continue to watch for isolated wind slabs and loose wet activity.

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