Turnagain Pass Avalanche Forecast RSS

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ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Sat, November 30th, 2013 - 7:00AM
Expires
Sun, December 1st, 2013 - 7:00AM
Forecaster
Kevin Wright
Avalanche risk The Bottom Line

An overall  LOW  danger dominates Turnagain Pass.  The possible exception is areas with stiff wind slab near ridge tops where a strong wind has been blowing since Thursday.  The nature of our current snowpack is weak snow over weak snow, making avalanche activity difficult to initiate unless the surface snow is noticeably stiffer and denser.  

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Sat, November 30th, 2013
Alpine
Above 2,500'
Low (1)
Avalanche risk
Treeline
1,000'-2,500'
Low (1)
Avalanche risk
Below Treeline
Below 1,000'
Low (1)
Avalanche risk
Alpine
Above 2,500'
Avalanche risk
Low (1)
Treeline
1,000'-2,500'
Avalanche risk
Low (1)
Below Treeline
Below 1,000'
Avalanche risk
Low (1)
Danger Scale:
No Rating (0)
Low (1)
Moderate (2)
Considerable (3)
High (4)
Extreme (5)
Avalanche Problem 1
  • Wind Slabs
    Wind Slabs
Wind Slabs
Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.
More info at Avalanche.org

The general snowpack structure consists of a weak base with a slightly stronger (but still weak) upper layer of snow that fell last Thursday, Nov 21st.  The most concern can be found in areas that have been wind loaded in the last couple days, with a stiff and cohesive wind slab.  There is still some evidence visible from natural avalanche activity caused by the wind.  All avalanche activity that we have seen in the last 2 days has followed this pattern.

Leeward facing slopes, which are predominately southeast and east faces but may include other aspects, are the primary concern today.  The thin and shallow snowpack makes all avalanche activity low volume, but exposed rocks and trees create an additional hazard that we don’t experience most of the winter.   

Check out Wendy’s observation from Thursday with more pictures of some of that wind loading action. 

Weather
Sat, November 30th, 2013

Clear and cold weather persists across the region.  Temperatures this morning hover around zero F.  A few weather stations are reading higher, and a few are reading lower.  Wind at the ridgetops is expected to remain 15-30mph from the North.  

This pattern is expected to to stay with us through the weekend.  A warming trend is forecasted to start on Sunday with precipitation (hopefully) by Tuesday.

Observations
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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
Glacier District
Johnson Pass
Open
No parking in turnaround at end of the road near the outhouse.
Placer River
Open
Please do not ride along Railroad tracks. Cross tracks at 90 degree angle and clear the right of way.
Skookum Drainage
Closed
The Skookum Valley is closed to snowmachines. This closure occurs annually on April 1 as per the CNF Forest Plan.
Turnagain Pass
Open
Twentymile
Open
Please do not ride along Railroad tracks. Cross tracks at 90 degree angle and clear the right of way.
Seward District
Carter Lake
Open
Lost Lake Trail
Open
Primrose Trail
Open
Resurrection Pass Trail
Closed
Closed for the 2020/21 winter season.
Snug Harbor
Open
South Fork Snow River Corridor
Open
Summit Lake
Open

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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.