It has been a week since significant precipitation or loading has occurred in the area. All of our information over the past seven days has come from tests in snow pits in the mid and lower elevations. The general trend in our tests has shown us that it is slowly becoming more difficult to trigger an avalanche. The one variable that has remained the same is the potential for avalanches to propagate across entire slopes. This fact alone has kept us tip toeing around the mountains lately. Travel into the more suspect areas (e.g. upper elevation starting zones and steep terrain) has not happened. This makes it more difficult to truly have a comprehensive understanding of the snowpack.
The foundation of the snowpack is weak. Faceted snow near the ground is prevalent throughout the area. The slab that has formed over the past month is between 1 and 3 feet deep, depending on elevation (deeper in the higher elevations). This slab is strong enough in many areas to support the weight of a person or snowmachine. The areas where that is not the case are:
Steep rollovers & convexities.
Steep open slopes, generally above 35 degrees and certainly above 40 degrees.
Thin spots in the slab. Areas with shallow snow that are connected to areas with deeper snow, commonly found along ridgecrests.
It is worth avoiding these areas for the time being. The weak snow near the ground simply needs more time to adjust to the slab above it.
In the past 24 hours the mountains around Eastern Turnagain Arm have received no new snow. Temperatures have averaged 12 degrees F at ridge tops. Wind direction has shifted overnight and is currently blowing out of the East. The 24 hour average wind speed was 5mph with gusts to 23mph.
Today will bring another uneventful day in terms of weather in the mountains. Temps at 1,000′ will reach the mid 20s F. Winds will remain light out of the East. There is a slight chance for snow during the day with little accumulation expected.
The beginning of this coming week looks to bring continued clouds and light precip to the area. The long term outlook is starting to show the potential for more significant precipitation by the middle of the week.
|05/21/22||Turnagain||Avalanche: Magnum, Lipps and Tincan||CNFAIC Staff|
|05/17/22||Turnagain||Avalanche: Sunburst||CNFAIC Staff|
|05/17/22||Turnagain||Observation: Tincan Ridge||Joe Kurtak|
|05/11/22||Turnagain||Avalanche: Cornbiscuit and Magnum west faces||CNFAIC Staff Forecaster|
|05/07/22||Turnagain||Observation: Granddaddy||Kit Barton|
|04/29/22||Turnagain||Observation: Sunburst wx station||AS/ MM/ AM/ NH|
|04/28/22||Turnagain||Observation: More Turnagain Pass/Summit Lake wet slab activity||Alex Marienthal|
|04/27/22||Turnagain||Observation: Magnum||Sykes / Buttrick Forecaster|
|04/27/22||Turnagain||Observation: Girdwood/Summit/Turnagain Road obs||A S|
|04/24/22||Turnagain||Avalanche: Seattle Ridge – large glide avalanche on Repeat Offender path||CNFAIC Staff Forecaster|
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: firstname.lastname@example.org
|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.