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ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Mon, November 6th, 2017 - 7:00AM
Expires
Tue, November 7th, 2017 - 7:00AM
Forecaster
CNFAIC Staff
Avalanche risk The Bottom Line

Image of Tincan at 3pm Sunday, Nov 5th after 3″ dusting of snow.  Turnagain Pass is still very thin – snowpack from 0″ to possibly 1′ at the high elevations, even 2′ where the winds have blown in snow.  
 
 


Photo from Peter Wadsworth of  Sunburst on Monday Nov 6th.    

 

 

In anticipation of the next storm, we are expecting the cold weather to break down the existing snow and turn it to facets (bad news for the base of a snowpack). Hence, we will be mapping out where and how thick the older snow is to assess future avalanche potential. Hint: photos of slopes, valleys, ridges, etc are a great way to help us with this! What about the wind? There is cold air pushing down from the interior which will create strong winds in Southcentral. Turnagain Pass may be spared but other areas may not. Winds can increase avalanche hazard by rapidly loading slopes – and on that note, we’d like to remind folks about  some  early season avalanche tips.

Early season hazards:

Rocks, alders, crevasses and  avalanches.  

Little snow. Keep it simple. What to clue into:

1)  Rapid changes in weather? This includes recent or current snowfall, wind, rain on snow and warm temperatures after a storm. One layer of snow can be a slab!  

2)  Recent avalanches in the past 1 or 2 days?

3) Cracking, collapsing, whumphing?   (see photo below)

4) What are the consequences if the slope does slide? Will you go off a cliff? Into a crevasse? Over the rocks? Are there other terrain traps?

Natural avalanches during late October across from the Crow Pass trail in upper Crow Creek Valley (photo: Mike Records)

**Remember the Crow Pass trail crosses several avalanche paths and even a small early season storm can produce slides that run over the trail.

A little over a 2 foot snowpack at 5,000′ at the head of the Milk Glacier. Location of a very large whumph. The top 10″ layer of harder snow is suspected to have collapsed into the weaker faceted snow below (classic set up for slab avalanches). (Mike Records photo)

 

Final thought for this update: *THINK COLD POWDER!!!!

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Mon, November 6th, 2017
Alpine
Above 2,500'
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1,000'-2,500'
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Below Treeline
Below 1,000'
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Above 2,500'
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Weather
Mon, November 6th, 2017

PRECIPITATION 24-hour data (6am – 6am)

  Temp Avg (F) Snow (in) Water (in) Snow Depth (in)
Center Ridge (1880′)        
Summit Lake (1400′)        
Alyeska Mid (1700′)        

RIDGETOP 24-hour data (6am – 6am)

  Temp Avg (F) Wind Dir Wind Avg (mph) Wind Gust (mph)
Sunburst (3812′)        
Seattle Ridge (2400′)        
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Riding Areas
Updated Thu, April 01st, 2021

Status of riding areas across the Chugach NF is managed by the Glacier and Seward Ranger Districts, not avalanche center staff. Riding area information is posted as a public service to our users and updated based on snow depth and snow density to prevent resource damage at trailhead locations. Riding area questions contact: mailroom_r10_chugach@fs.fed.us

Area Status Weather & Riding Conditions
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No parking in turnaround at end of the road near the outhouse.
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Please do not ride along Railroad tracks. Cross tracks at 90 degree angle and clear the right of way.
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The Skookum Valley is closed to snowmachines. This closure occurs annually on April 1 as per the CNF Forest Plan.
Turnagain Pass
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Twentymile
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Please do not ride along Railroad tracks. Cross tracks at 90 degree angle and clear the right of way.
Seward District
Carter Lake
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Lost Lake Trail
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Primrose Trail
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Resurrection Pass Trail
Closed
Closed for the 2020/21 winter season.
Snug Harbor
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South Fork Snow River Corridor
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Summit Lake
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This is a general backcountry avalanche advisory issued for Turnagain Arm with Turnagain Pass as the core advisory area. This advisory does not apply to highways, railroads or operating ski areas.