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Turnagain Pass Avalanche Forecast RSS

Archives
ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Fri, December 2nd, 2011 - 7:00AM
Expires
Sat, December 3rd, 2011 - 7:00AM
Forecaster
Kevin Wright
The Bottom Line

Good morning. This is Kevin Wright with the Chugach National Forest Avalanche Information Center on Friday, December 2nd at 7am. This will serve as 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).

ANNOUNCEMENT

The Seward District opened all motorized areas yesterday. Check the riding areas at the bottom of this page for the latest updates. Placer river and Twentymile remain closed until we get more snow cover.

BOTTOM LINE

Today’s avalanche danger rating is MODERATE for windslab near the ridgetops sitting on top of older faceted snow. The recent storm on Tuesday night brought variable amounts of snow into the region with highest amounts near Seward and Girdwood, lesser snowfall happened in Turnagain and Summit. This snow was accompanied by high wind and warming temperatures.

AVALANCHE DISCUSSION

Our recent storm brought less precipitation than was originally expected, but it still affected our area with increased avalanche hazard on Wednesday. With the weather staying mild yesterday and today the overall danger is back down to moderate. Our primary concern today is wind loaded slopes above treeline.

Yesterday we found variable conditions climbing to the ridge. The stiffer snow and fresh cornices on North and West slopes confirmed the wind loading direction from the recent storm.

Digging below the surface shows the recent storm snow is sitting on top of facets from the multi-week cold snap in November. It’s not a well defined “strong snow over weak snow” scenario, but we could identify a couple layers of concern. Take a look at our pit data from yesterday here. We could identify 2 interfaces that failed with strong force. These could be a problem in areas with greater wind loading or when we get more stress in the form of snow or rain.

During the next few days it will be prudent to keep an eye on the weather. More snow is possible, with wind and even warmer temperatures.

MOUNTAIN WEATHER

Snow in the mountains with rain possible at sea level. Snow accumulation looks to be limited in the next 24 hours with 1-3 inches. Temperatures are near freezing and expected to stay that way. Wind will be light inland with moderate winds through channeled areas like Turnagain Arm and Portage Valley.

I will issue the next advisory Saturday morning. If you get out in the backcountry we want to know what you are seeing. Please send us your observations using the button at the top of this page or give us a call at 754-2369. Thanks and have a great day.

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Fri, December 2nd, 2011
Alpine
Above 2,500'
Moderate (2)
Avalanche risk
Treeline
1,000'-2,500'
Moderate (2)
Avalanche risk
Below Treeline
Below 1,000'
Moderate (2)
Avalanche risk
Alpine
Above 2,500'
Avalanche risk
Moderate (2)
Treeline
1,000'-2,500'
Avalanche risk
Moderate (2)
Below Treeline
Below 1,000'
Avalanche risk
Moderate (2)
Danger Scale:
No Rating (0)
Low (1)
Moderate (2)
Considerable (3)
High (4)
Extreme (5)
Observations
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Riding Areas
Updated Mon, October 26th, 2020

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
Closed
Placer River
Closed
Skookum Drainage
Closed
Turnagain Pass
Closed
Twentymile
Closed
Seward District
Carter Lake
Closed
Lost Lake Trail
Closed
Primrose Trail
Closed
Resurrection Pass Trail
Closed
Snug Harbor
Closed
South Fork Snow River Corridor
Closed
Summit Lake
Closed

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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.