Calm and clear today. Temps in the Valley were in the high 30s. At 8000' near WA pass temps were 19 degrees. Above Slate Peak we got a low of 16 degrees. Great visibility today.
Mar 14, 2023
Silver Star Mountain
|HS-Hard Slab||I-New/Old Interface||N-Natural||Report|
The observed avalanche from Silver Star Mountain is fairly old. It probably released around the 14th of March when those other large slides occurred off of Kangaroo.
We flew over the Washington Pass zone and Harts Pass zone to gather some observation. We got to see a couple hundred square miles of the North Cascades peering into the Sawtooths, the Pasayten, and the North Cascades National Park. Below about 4500' there have been numerous wet loose avalanches which occured mostly around March 22nd and again around the 29th. Higher up there is a nice 6" dusting of new snow from April 1st. I can't speak to the sensitivity of any lingering wind slabs up high, but we did not see signs of any recent natural wind slabs. We did observe an older deep avalanche off Silver Star Mountain. This was probably from mid March. See above. We also spotted a glide avalanche which released on granite slab on the south side of Hinkhouse, not too far from the highway overlook. There are a number of similar granite slabs along this slope as it heads West. There are some large cornices out there. I didn't see signs of any that have fallen. The one above Blue Lake Col is quite large.