Urban Avalanche Advisory
Current Advisory as of
February 23, 2019
Expires 7:00 AM the following morning.
Issued By Tom Mattice
Primary Avalanche Problem
During both storms this week that deposited 60+cm of snow we had strong winds from the ESE. This has created great potential on West to North facing slopes.
We have seen a lot of recent skier triggered avalanche activity on these layers as well as snowmobile triggered event and this was before the second, stronger half of the storm that had increased loading rates and higher winds.
Yesterday we had natural avalanche releases in many location around the region on several different aspects.
Yesterday and Today we have a Taku wind event kicking up that will greatly increase concern for the Berhands Path and others on Mt Juneau. With multiple wind events from Multiple angles stay safe out there and choose low angle slopes with limited exposure.Learn more about Wind Slab.
Secondary Avalanche Problem
We have not seen any significant activity off of Mt Juneau. There is a potential to have this deeper persistent weak layer present in this location.
During Feb 1-5 we had a cold snap at the end of a wet storm that plunged to -1f. This developed a Near Surface Faceted Layer that is now a persistent weak layer. My guess is this layer is down between 80-90cm in most locations. Deeper in windloaded areas. Perhaps shallower in wind stripped locations.
With todays Taku wind event directly loading the urban faces and this potential weak layer in place this is the reason the forecast is set to Considerable today. Natural avalanches are quite possible and human triggered slides are likely in places.
My guess is mostly we will see size 2 events around the region but on this slope the deeper event would definitely be a size 3 plus event should it occur. Two size 3 slides were noted yesterday in the region.
Please avoid walking above the gates in the Berhands Neighborhood.
Probably also a good day to avoid the Flume Trail.Learn more about Persistent Slab.