Despite the light winds the past couple days, shallow and very sensitive slabs have been able to form in scattered areas along ridgelines (shown in the photo below). This is mainly due to the weekend’s snow being so light and easy to transport. They didn’t pack much punch yesterday but a bump in wind overnight with plenty of low density snow available for transport will likely have continued wind slab development. Watch for these to be 6-10″ thick and on a variety of aspects – winds have been blowing from various directions due to our region being in the heart of a low pressure system. Keeping an eye on the snow texture as well as for shooting cracks from your skies/board or sled will be key.
Loose snow avalanches are expected to be prevalent again today. These are both in the dry snow category and the wet/damp snow category (pending clear skies):
Dry snow: The very cold overnight temperatures will add to the looseness of the surface snow (and to the good riding/skiing conditions). This should keep dry sluffs something to plan for on steep slopes.
Wet/damp snow: If the skies remain clear today, the sun should have ample time to warm southerly aspects. Watch for dampening of the snow surface to turn a small low volume dry sluff into a larger heavier damp sluff. Shallow slabs are also possible with daytime warming on southerly aspects. These sluffs and slabs have the potential to release naturally if we do get intense sunshine today.
Under mostly clear skies this morning, temperatures have plummeted to the single and minus single digits. Winds have remained light from the north and west with a slight bump overnight to the 15-20 mph range. Yesterday, mostly cloudy skies limited much daytime heating and 24-hour average temperature at the Sunburst wx station was +1F while winds averaged 4mph with gusts to 16.
Today, a few clouds are likely to stream through but the sun should have time to warm things up a bit. Temperatures should reach the mid 20’sF at sea level up to treeline and the low teens on the ridgetops. Winds will be light and slowly backing to the SE where they look to pick up tonight to the 15mph range.
Beautiful spring weather consisting of sunny days, cold nights and light to moderate northerly winds are on tap for the remainder of the week and into the weekend.
Kevin will issue the next advisory tomorrow, April 12th.
|04/19/21||Turnagain||Avalanche: Triangle, Seattle creek||Will Morrison|
|04/18/21||Turnagain||Avalanche: Turnagain Pass Road Obs||Andy Moderow|
|04/18/21||Turnagain||Observation: Seattle Ridge, approximately 300 yards south of the up track||Brent Byrne|
|04/17/21||Turnagain||Avalanche: Road obs||Johnston-Bloom / Moderow Forecaster|
|04/16/21||Turnagain||Avalanche: Seattle Ridge||Wendy Wagner Forecaster|
|04/16/21||Turnagain||Avalanche: Turnagain Pass, non-motorized side seen from Seattle Ridge||CNFAIC Staff Forecaster|
|04/16/21||Turnagain||Observation: Sunburst||Lance breeding|
|04/15/21||Turnagain||Observation: Tincan||Schauer/ Rothman Forecaster|
|04/13/21||Turnagain||Observation: Turnagain Pass Road Obs||A Schauer Forecaster|
|04/12/21||Turnagain||Observation: Tincan||Johnston-Bloom / Latosuo 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.