City and Borough of Juneau
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Urban Avalanche Advisory
Current Advisory as of Wednesday, March 22, 2017
Expires 7:00am on Thursday, March 23, 2017
The National Weather Service Forecasts-
Primary Avalanche Problem
DescriptionWe have several reactive weak layers in the region. This weakness is widespread.
We have seen both natural and human triggered avalanches on it in the last week and human triggered slides are still very likely.
Dig pits and look to see what the bed surfaces are where your riding? How is the bonding at 35? 50? 75cm? The depth may vary a great deal due to windloading. But these are sizeable slides and not to be ignored.
Secondary Avalanche Problem
DescriptionWith continued near and above freezing temps look to see wet loose avalanches.
These can be easily started from snow falling off of trees and rocks in steep sections. It gathers mass and speed... then can often be the source of a trigger for the larger avalanches... these small slides are not to be ignored when you have a greater instability in the region.
If we see much direct sunlight you can expect greater levels of activity. If temps remain cool and clouds stay overhead activity will remain to a minimum.
Today's Avalanche Tip
Here is a link to a 20 minute avalanche awareness lecture from AIARE called introduction to avalanches and unstable snow.