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Turnagain Pass Avalanche Forecast RSS

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ARCHIVED FORECAST - All forecasts expire after 24 hours from the posting date/time.
Issued
Wed, April 4th, 2012 - 7:00AM
Expires
Thu, April 5th, 2012 - 7:00AM
Forecaster
Kevin Wright
The Bottom Line

Good morning. This is Kevin Wright with the Chugach National Forest Avalanche Information Center on Wednesday, April 4th 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).

ANNOUNCEMENTS

Skookum drainage is now closed to motorized use for the season. All CNFAIC Staff motorized areas on the Glacier Ranger District, including Placer Valley, 20-Mile and Johnson Pass remain open.

BOTTOM LINE

We can expect 2 time zones in the avalanche danger today. This morning a LOW with pockets of MODERATE trend exists with a hard surface crust in most areas except Northerly upper elevation slopes. This afternoon/evening the trend moves towards overall MODERATE if the temperature increases enough to cause wet avalanching.

AVALANCHE DISCUSSION

With the degree of freezing last night, the possibility of finding avalanches this morning is isolated to upper elevation Northerly pockets where buried surface hoar might still be reactive. If temperatures get high enough in the afternoon the possibility of wet avalanches is pretty good, but all that solar energy will have to penetrate and melt the surface crust first. Travel late in the day should be strategically planned to avoid traveling on sunny slopes and near the bottom of large runout areas.

Concern #1 – Buried Surface Hoar

This problem has shown itself to be pockety in nature. It’s not hard to find in wind loaded areas above 2000 feet on shaded aspects. It’s generally confined to the top foot of the snowpack, and the slab size seems to be in the smaller size range. The worst case scenario would be dropping into a steep North facing line where the runout takes you places you don’t want to go.

Concern #2 – Wet Avalanches

Late in the day on sunny low elevation slopes, natural activity is possible if our temperatures rise significantly. This problem didn’t happen very severely yesterday with relatively colder temperatures and a really solid crust from the previous night. If the heat melts the crust this afternoon start thinking about getting off the South facing slopes before they fall apart in the evening.

MOUNTAIN WEATHER

Warm temperatures during the day and a hard freeze the last 2 nights means a solid supportable crust below 2000 feet across our region. It’s been a while since any snowfall, and there is only a slight possibility of snow today. Clouds are expected to take over the sunny skies this afternoon and a chance of rain or snow is creeping into the forecast tomorrow.

CNFAIC Weather Page and the NWS forecast

Wendy will issue the next advisory Thursday 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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Wed, April 4th, 2012
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)
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Riding Areas
Updated Fri, May 01st, 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
Closed as of May 1. Thanks for a fun, safe season!
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.