CNFAIC LogoCNFAIC Logo

Avalanche Advisory

Turnagain Area Avalanche Advisory
Forecaster:   Wendy Wagner  
Sunday, December 11th 2011
Created: Dec 11th 6:53 am
3 Considerable Alpine / Above 2,500' Travel Advice: Dangerous avalanche conditions. Careful snowpack evaluation, cautious routefinding and conservative decision-making essential.
3 Considerable Treeline / 1,000'-2,500' Travel Advice: Dangerous avalanche conditions. Careful snowpack evaluation, cautious routefinding and conservative decision-making essential.
3 Considerable Below Treeline / Below 1,000' Travel Advice: Dangerous avalanche conditions. Careful snowpack evaluation, cautious routefinding and conservative decision-making essential.
 Show the Complete North American Avalanche Danger Scale
TOTE Maritime
The Bottom Line
Good morning. This is Wendy Wagner with the Chugach National Forest Avalanche Information Center on Sunday, December 11th 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).

ANNOUNCEMNTS
Dont miss Wednesday nights big double premiere and CNFAIC benefit!! The Continuum along with One For the Road will be playing at the Sitzmark Bar & Grill Alyeska Resort. More details are on our training and calendar page. Also, the string band Midnight Sun Zombies, will be playing. Come on out and show your support!

BOTTOM LINE
The avalanche danger is CONSIDERABLE for wind slab avalanches on all wind drifted slopes due to strong wind and new snow overnight and throughout today. Naturally occurring wind slab avalanches are possible and human triggered avalanches are likely. Expert level route finding and terrain management skills will be necessary for backcountry travel today.

AVALANCHE DISCUSSION
A pulse of new snow and strong wind overnight has increased the avalanche danger. Around 6-8 of snow has fallen above 2000' in the Girdwood Valley, Turnagain Pass and Summit Lake areas. The snow has come in with sustained northeasterly winds around 35-40mph, gusting to 70mph. Snowfall and wind have tapered off this morning, but are forecast to intensity again throughout the day.

Wind slab avalanches are the primary concern. Fresh deposits of wind drifted snow will be sensitive and likely easily triggered by a person. Watch for unusual loading patterns from the strong winds at all elevations. This includes, wind slabs building mid-slope and around subtle terrain features. The slabs formed overnight and today should vary in depth and strength, from deep and soft to hard and supportable. Deep wind slabs and slabs that are supportable have the best chance of breaking above you and taking you for a ride.

If there are any areas that have escaped wind damage, watch for soft slab avalanches. The new snow has fallen with increasing temperatures causing an upside down layering. This set up will enhance the instability in the new storm snow.

MOUNTAIN WEATHER
Yesterday afternoon, skies became cloudy and winds picked up ahead of a storm system impacting our area today and into Monday. Overnight, winds blew on the ridge tops from the NE at 40mph with gusts into the 70s. Snowfall, adding up to 6-8 above 3000 and 2-3 at 1800, accompanied the wind. Temperatures have risen 2-5 deg. F at most stations and are currently around 30F at 1800 and in the mid 20s at 3000.

Snowfall intensity has decreased this morning but will increase again throughout the day. Expect anCNFAIC Staff 8-10 above 2000, with around a foot in favored locations. The NE winds have also decreased this morning but are forecast to pick up again, gusting to 60+mph. Temperatures should remain steady.


CNFAIC Weather Page and the NWS forecast

I 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
© 2017 Chugach National Forest Avalanche Information Center. All rights reserved.
FCNFAIC