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Avalanche Advisory

Turnagain Area Avalanche Advisory
Forecaster:   Kevin Wright  
Saturday, December 10th 2011
Created: Dec 10th 6:43 am
2 Moderate Alpine / Above 2,500' Travel Advice: Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
2 Moderate Treeline / 1,000'-2,500' Travel Advice: Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
2 Moderate Below Treeline / Below 1,000' Travel Advice: Heightened avalanche conditions on specific terrain features. Evaluate snow and terrain carefully; identify features of concern.
 Show the Complete North American Avalanche Danger Scale
The Libby Group
The Bottom Line
Good morning. This is Kevin Wright with the Chugach National Forest Avalanche Information Center on Saturday, December 10th 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).

BOTTOM LINE
The avalanche hazard will increase today proportionately to the snow and wind from the storm. The danger level will likely go through a wide spectrum, from generally LOW this morning to CONSIDERABLE tonight as the storm ramps up. The most dangerous conditions likely to be encountered during daylight hours today are MODERATE. Watch the weather and make travel decisions based on the conditions you are seeing.

AVALANCHE DISCUSSION
There are 2 distinct discussions today - before the storm and after the storm arrives.

1. Before the storm arrives late today the primary concern is isolated windslab at upper elevations. Watch the snow depth and feel the density changes as you travel to track those slabs. Be aware they could break unexpectedly near ridgetops under human weight.

All of our data indicates a decreasing avalanche trend over the last few days. That trend will continue this morning but reverse this afternoon.

2. AnCNFAIC Staff storm is entering the region and intensifying by 6pm. Heavy snow, wind, and increased temperatures are expected, which will raise the avalanche danger. The general pattern is very similar to the storm from a week ago. It looks like it wont affect people doing day trips today, but could become dangerous quickly in the evening and by tomorrow morning. The National Weather Service is issuing a Blizzard Warning at 6pm tonight for Turnagain Pass North. A Blizzard Warning means that severe winter weather conditions are expected. All travel and outdoor activity is strongly discouraged.

MOUNTAIN WEATHER
This week has been a mixed bag of weather. The intense storm last Sunday caused many natural avalanches from Seward to Hatcher Pass. Since then a mid week snowfall covered the breakable rain crust with a pleasant 4-8 inches of dry snow. Tonight, conditions will change again with Blizzard conditions forecasted. A deep Low in the Bering Sea is bringing an intense stream of moisture from lower latitudes North into Alaska. Heavy snow tonight with 7-16 inches is expected. East wind 40-60mph or higher.

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CNFAIC Weather Page and the NWS forecast

Wendy will issue the next advisory tomorrow morning at 7am. 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.


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).

Winter snowmachine use open/closed status and riding conditions updates

Riding status is not associated with avalanche danger. An area will be open to motorized use in accordance to the Forest Management Plan when snow coverage is adequate to protect underlying vegetation. Backcountry hazards including avalanche hazard are always present regardless of the open status of motorized use areas.

(Updated: May 16, 2017 )

AREA STATUS WEATHER AND RIDING CONDITIONS
Glacier District
Johnson Pass: Closed
Placer River: Closed
Skookum Drainage: Closed
Turnagain Pass: ClosedThanks all for a safe and fun season on the Chugach NF! Stay tuned for the 2017/18 season. #playsafe #snowtosealevel
Twentymile: Closed
Seward District
Carter Lake: Closed
Lost Lake Trail: Closed
Primrose Trail: Closed
Resurrection Pass Trail: ClosedResurrection Pass trail will be open to snowmachine use during the 2017/18 winter season.
Snug Harbor: Closed
South Fork Snow River Corridor: Closed
Summit Lake: Closed

Subscribe to the Turnagain Area Avalanche Advisory:

The information in this advisory is from the U.S. Forest Service, which is solely responsible for its content. This advisory describes general avalanche conditions and local variations always occur. This advisory provided by the Chugach National Forest, in partnership with Friends of the Chugach National Forest Avalanche Information Center.


USFS SNOW AND AVALANCHE HOTLINE (907) 754-2369
If you have comments or questions regarding CNFAIC operations or winter recreation management, please email staff@chugachavalanche.org
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