|Signal Word||Size (D scale)||Simple Descriptor|
|Small||1||Unlikely to bury a person|
|Large||2||Can bury a person|
|Very Large||3||Can destroy a house|
|Historic||4 & 5||Can destroy part or all of a village|
Today’s weather is forecast to be a little bit of everything. It looks to start out sunny and then transition to rain and snow showers with increasing East winds. Crusts that formed overnight may or may not soften in the sunshine by late afternoon. If the snow does become soft (and especially if it starts to rain after) the potential for wet loose activity at lower elevations will increase. Observations over the weekend found the weakest wet snow conditions below 2500’ on very steep East to South aspects. There is more potential for wet snow to entrain a larger avalanche in this elevation band if they warm up enough. Don’t let this catch you off guard if you start out in the upper elevations and the snow quickly changes as you descend. Pay attention to surface crusts as they break down and become moist. When the snow becomes wet and ‘mushy’ and your skis or snowmachine track start trenching into wet snow, it’s time to find supportable surfaces. Even a small wet avalanche could be hard to manage especially in a terrain trap.
Cornices: Daily warming and sunnier weather can make cornices more unstable. As always, give cornices plenty of space and limit exposure underneath them.
Recent cornice triggered slab avalanche above Skookum and old wet loose avalanches.
Triggering a persistent slab 1-2’ deep is becoming less likely with time. Old weak snow (facets) buried within the top 2’ of the snowpack has been found in the upper elevations over the last few weeks. Northerly aspects above 3000’ with dry snow may harbor this set up. So far there have been no reports of any avalanche activity on these shaded slopes following last week’s storm. However, the periphery of our forecast zone is more suspect, Crow Pass area and Johnson Pass to Summit Lake, where a thinner (weaker) snowpack remains. Before committing to steeper slopes in the upper elevations, take a moment to evaluate the terrain for consequences should a slab release.
Yesterday was partly sunny with high clouds moving in. Temperatures were in the 30Fs and 40Fs. Winds were from the East 5-15 mph with gusts into the 20s. Overnight temperatures were in the low 30Fs to mid 20Fs.
Today is forecast to be partly to mostly cloudy. There is chance of rain and snow showers in the late afternoon. Easterly winds will increase with gusts into the 30s and 40s. Temperatures will be in the 20Fs to low 40Fs depending on elevation. Tonight rain and snow showers are likely but not much accumulation is expected. Rain/snowline is forecast to be around 1000′.
Tomorrow the rain and snow showers continue and East winds will remain elevated. Temperatures will be in the high 20Fs to low 40Fs.The wet weather and Southeast flow continue into Thursday. There is another low moving into the Gulf this weekend, which could bring more rain to the area.
|Temp Avg (F)||Snow (in)||Water (in)||Snow Depth (in)|
|Center Ridge (1880′)||36||0||0||65|
|Summit Lake (1400′)||30||0||0||23|
|Alyeska Mid (1700′)||35||0||0||60|
|Temp Avg (F)||Wind Dir||Wind Avg (mph)||Wind Gust (mph)|
|Seattle Ridge (2400′)||31||ESE||10||25|
|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.