Avalanche Advisory Archive 2016 – 2018

Date Issued:2017-03-04 07:55:04
Danger:4
Primary Trend:2
Primary Probability:3
Primary Likelihood:4
Primary Size:2
Primary Description:

With continued winds on Douglas and the mainland of 18-25 you can see active windloading occuring.

Yesterday Mt Juneau had a natural avalanche on the Berhands path caused by these winds. Mt Roberts also had controlled releases showing us that all slopes are near a state of failure.

Be cautious in windloaded areas and recognize the mousetrap is set and simply awaiting a trigger... YOU... Choose your terrain wisely.

Secondary Trend:1
Secondary Probability:1
Secondary Likelihood:3
Secondary Size:2
Secondary Description:

I would expect the loose snow sluffs to be stabilizing in most places. The windloaded areas may be the exception to that... We may continue to see loose dry snow sluffs in windloaded ares... or off of steep pitches as trees and rocks clean in the afternoon sun.

Discussion:

The National Weather Service Forecasts-

Today- Sunny. Highs around 22. North wind 15 to 25 mph decreasing to 10 to 20 mph late in the afternoon. Locally higher gusts near downtown juneau and douglas in the morning.

Tonight- Mostly clear. Lows 9 to 15. North wind 10 to 15 mph... Except northeast 15 to 25 mph with gusts to around 40 mph near downtown juneau and douglas.

Sunday- Partly cloudy. Locally windy. Highs around 21. North wind 10 to 20 mph. Near downtown juneau and douglas, northeast wind to 30 mph with gusts to around 45 mph.

Yesterday a number of Natural and Human Triggered avalanches both were observed around the region. Far more in the windloaded areas than in sheltered areas.

Today once again Natural Avalanches remain possible and human triggered avalanches are more than likely. Avalanche Danger remains HIGH>

Pick your lines carefully and limit your exposure to the terrain. Avoid Terrain Traps

We received 18-22\" of snow around the region which is very low density. This low density snow moves easily and increases the instability in windloaded areas rapidly. The windslabs may be quite large in places so caution is advised.

Also be aware that sun on slopes today may trigger small loose snow avalanches from snow falling off of trees and rocks in the steep areas. This low density snow will entrain easily and build larger sluffs.

Conditions are slowly stabilizing but with continued windloading it will take a little more time. Windloading becomes reduced the farther we get from the storm. And snow heals over time. I assume danger levels will be decreased somewhat by tomorrow.

Tip:

Just becuase its a sunny day remember not to have preset goals... don't let the sun and excitement change your decision making process... Remember while you were in the office this week the storm hit and buried the mountains... This will take some time to stabilize and until then remember to choose your terrain wisely.

Good habits today friends... Avalanche Transceivers, probes, and shovels... a well trained partner... and a plan!!! Be safe out there and live to play another day!

Forecaster:Tom Mattice