Yesterday was the first day since last weekend’s storm that avalanches were not reported. It has been five days since the storm ended and the weak surface snow (near surface facets and surface hoar) from the March high pressure/drought was buried. Slab depths vary across the advisory zone due to the range of storm totals from 6″ to 2+ feet. Most of the avalanches that have occured have been small human triggered pockets and not well connected; a testament to the relatively cold weather this week keeping the new snow loose and mostly unconsolidated. The slabs that have released have been in places where the slab is more cohesive, either due to wind effect or warmth/settlement. On Thursday one of the avalanches that was observed was thought to have been a natural that occured later in the day from warming and direct sunshine.
For today, with similar weather to the past few days, we can expect similar avalanche conditions. Triggering a slab avalanche is still possible. Things to keep in mind are:
Snow pit on Tincan Common. APU Snow Science Class
LOOSE SNOW AVALANCHES (SLUFFS): Human triggered dry loose snow avalanches continue to be easily triggered on steep slopes without a sun or wind crust on the surface. Watch your sluff if headed to these steep lines with loose surface snow, they could be larger and run further than expected. Pay attention to Southerly slopes as the afternoon temperatures become warmer. We could start seeing more wet loose avalanches from direct sunshine; cold temperatures have keep these to a minimum lately. Look for roller balls as an indication of surface snow warming.
CORNICES: There has been a couple of cornice breaks after the storm and cornices are always worth giving a wide berth. Direct sunshine and warming can help to loosen them.
GLIDE CRACKS: Glide cracks continue to slowly ooze open on Seattle Ridge, Tincan’s Library, Lynx creek and other zones. Keep an eye out for them and limit time spent underneath.
Sluffing on Magnum observed on Wednesday.
Yesterday was sunny and clear with temperatures in the 20Fs in the valleys and teens at ridgetops. Winds were light and variable. Temperatures dipped into the single digits overnight and skies were mostly clear.
Today the sunshine will continue with a similar temperature pattern and winds will remain light. Clouds are forecasted to roll in this evening and there is a chance of snow overnight.
Tomorrow will be mostly cloudy with a chance of snow showers and slightly warmer temperatures. According to the National Weather Service “Real change continues to be advertised by all models early into next week and the bottom line is that the pattern is now on the verge of change and the days of cold and endless sun are going on a brief hiatus.” The track of the low moving into the Gulf is still uncertain. Stay tuned!
PRECIPITATION 24-hour data (6am – 6am)
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||15||0||0||63|
|Summit Lake (1400′)||13||0||0||29|
|Alyeska Mid (1700′)||20||0||0||58|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||12||variable||4||11|
|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: 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.