The faceted weak layer on top of the January melt/freeze crust is definitely the most concerning part of the snowpack. It has been responsible for widespread collapsing and avalanche activity over the last 2 weeks.
The sensitivity of this weak layer seems to be waning, but probably because it is now buried more than 2 feet in most places, and over 3 feet in some wind loaded areas. With that much snow insulating the problem layer, triggering will be more difficult.
This problem needs to be considered when you venture onto steeper terrain today. Consider the consequences of the slope releasing and the terrain in the runout below.
Crystal card grid is 3mm spacing. These facets produced an ECTP 14 – propagation under a moderate force. Location – Sunburst, south aspect, ~3200 feet.
The last snowfall was 2 days ago. Storm totals varied widely depending on location. The upper mountain of Alyeska received 22 inches, while Turnagain pass only had about 2 inches. Snowfall at Turnagain pass since February 7th has been 51 inches!
Weather yesterday partly cleared in the afternoon. Wind has been light since the last snowfall ended. Temperatures remain cold with single digits at ridgetop stations and teens at sea level.
A clearing trend is expected today. Partly cloudy in the morning and mostly sunny in the afternoon. Expect a north to west wind 10-20mph. High temperatures in the mid 20s.
|01/16/21||Turnagain||Avalanche: Tincan Trees||A Schauer Forecaster|
|01/15/21||Turnagain||Observation: Sunburst||Schauer/ Wunnicke Forecaster|
|01/13/21||Turnagain||Observation: Tincan||Johnston-Bloom / Moderow Forecaster|
|01/13/21||Turnagain||Observation: Center Ridge Meadows||Alaska Avalanche School Rec Level 1 Roberts|
|01/12/21||Turnagain||Avalanche: Seattle Ridge/Center Ridge||A Schauer Forecaster|
|01/11/21||Turnagain||Observation: Tincan Trees||Schauer/ Roberts Forecaster|
|01/10/21||Turnagain||Observation: Center Ridge Meadows||Alaska Avalanche School Pro 1 Course Latosuo|
|01/10/21||Turnagain||Avalanche: Tincan trees||Anonymous|
|01/09/21||Turnagain||Observation: Johnson Pass||Anonymous|
|01/08/21||Turnagain||Observation: Sunburst meadow between Hemlocks||Anonymous|
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: email@example.com
|Area||Status||Weather & Riding Conditions|
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.