We continue to see new wet avalanche activity. The big new one was on the west face of Cornbiscuit. The lower part of the upper face pulled out full depth sometime between Tuesday night and Wednesday morning. This area is above treeline but well within the zone that is getting rain. See photo below.
As long as temperatures remain above freezing and especially during active rainfall, wet slab avalanches are possible and can be quite dangerous.
Deep slab continues to be a concern as the upper elevations have stress added. The equation here is simple – known reactive weak layers are getting heavy additional loading day after day. These weak layers can cause large widespread avalanches anywhere from 4-7 feet deep and pull all the snow to the ground. This problem is also worse during periods of precipitation, but will linger even after the storm ends.
Steep upper elevation terrain should be avoided, especially during periods of intense precipitation.
Up in the higher elevations there is enough storm snow and wind loading to have problems in the recent layers. Think about wind slabs and storm slabs 1-3 feet in depth. If an avalanche is started in these layers it could possibly step down into deeper layers. I will be surprised if anybody actually makes it above the rain line today.
A steady jet of moisture is coming from subtropical latitudes, straight north to southcentral Alaska. This pattern is expected to persist through Friday night. According to the National Weather Service, the Eastern Kenai peninsula could get another 3-6 inches of rain through Friday afternoon. Freezing levels will also increase to 4000-6000 feet elevation.
Today looks like the warmest yet. Rain will continue, transitioning to snow around 2400 feet. Wind at the ridge tops – Southeast 28-40 mph.
The first sign of a break from this pattern is on Saturday, with a chance of partly sunny skies.
|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.