Issued: Sat, Dec 31, 2016 at 8AM

Expires: Sun, Jan 01, 2017

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 picked up Saturday, causing some fresh wind loading on lee aspects and terrain features/gullies. Any slopes with slabby layers near the top of the snowpack need to be treated with caution. Slopes with fresh or active wind loading and 30 degrees or steeper should be avoided. Please send in any observations of recent avalanches, whumphs, or shooting cracks.

Recent Avalanche Activity

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

Recent Weather

The mountains received 6-12″ of snow on the 26th-27th, and again on the 29th. The first storm produced cold, dry snow that makes a weak base for the wetter, heavier snow that fell on the 29th. Amounts were on the lower end up the highway and through the pass, and on the higher end in the Lutak zone. Winds were southerly, but switched to strong northerly on the 31st (20-40mph in the alpine).  Temperatures plummeted with the north winds, down to around 10F in the alpine.

Clear conditions are expected through the week, and the north winds will let up entirely. Furthermore, it will be warm…really warm. There will be a strong inversion Sunday-Tuesday with sub-freezing temperatures from 0 – 1000ft, but unusually warm above that. Temperatures above the inversion could reach 40F or more. Expect persistent valley fog and beautiful sunshine in the mountains above.

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