Issued: Tue, Dec 27, 2016 at 8AM

Expires: Wed, Dec 28, 2016

Above 2,500ft Considerable

1,500 to 2,500ft Moderate

Below 1,500ft Moderate

Degrees of Avalanche Danger ?

1. Low
2. Moderate
3. Considerable
4. High
5. Extreme

Avalanche Danger Rose ?

Avalanche Problems ?

Problem Details

North-northwest winds have been moderate at times this last week, causing some recent wind loading on lee aspects and terrain features/gullies. Any slopes with slabby layers near the top of the snowpack need to be treated as suspect. You can evaluate the strength of these slabs with test slopes and snowpack tests. Please send in any observations of recent avalanches.

Recent Avalanche Activity

Shooting cracks were observed within recent storm snow this weekend. Sliding surface was an ice crust 30cm deep.

One large natural slide (D3.5, R4) occurred around the 21st, on a wind loaded NE aspect at 3000′ below Ripinsky’s South summit. The crown was around a meter deep, so it likely ran on the weak storm snow from the 17th. Propagation with this slide was surprisingly wide, several hundred feet long.

Recent Weather

Sunday-Monday brought 6-12″ of new snow…blower pow. Light snow will continue through Thursday morning. A wave Wednesday night may bring some enhanced snowfall rates and heavier accumulations if it can make it far enough north.

Additional Info & Media

Even small slides can pile up deep. Stay out of gullies, depressions, and terrain traps. ALWAYS wear a beacon, shovel, and probe and know how to use them.

Posted in Transitional Zone Forecasts.
Erik Stevens

Forecaster: Erik Stevens