The nature of yesterday’s reported avalanche is driving a lot of this advisory today. We still have a shallow snowpack, so we can’t expect truly large avalanches to happen. Nonetheless, the new snow from Thursday and Friday (6 inches to 2 feet) is lying on a tenuous layer of weak faceted snow. The avalanche reportedly triggered sympathetic avalanches nearby. This is a big red flag for poor bonding and unstable snow. The report also goes on to say that testing showed “failure on isolation”, another big red flag.
We can expect the backcountry to be more stable than yesterday, but I have no doubt that trouble can be found if you go jump on a bunch of steep slopes. Terrain choices will drive safe decisions this weekend – bigger and steeper slopes should be avoided.
Other places, such as Max’s mountain in Girdwood were showing evidence of natural loose snow avalanches yesterday that stripped the snow to the ground. See picture below.
The bulk of the snowfall on Thursday and Friday came with strong Easterly wind. Deeper wind deposited snow will be found on West aspects and cross loaded North and South features.
Another few inches of snow fell yesterday morning, with the freezing rain down at sea level. Wind has dropped back to more reasonable levels. The temperature has cooled off from the mid 30s yesterday to the teens and 20s this morning.
Snow showers are still in the forecast today, but only a few inches at most. The weather does not appear to be contributing to any increase in the avalanche potential today.
|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|
|Area||Status||Weather & Riding Conditions|