Avalanche Advisory Archive 2016 – 2018

Date Issued:2017-01-27 07:19:41
Primary Trend:2
Primary Probability:3
Primary Likelihood:3
Primary Size:2
Primary Description:

With several weak layers that have built at upper elevations over the last week and 40-70mph winds this morning with continued loading windslab avalanches are likely today.

Depending on which weak layer becomes reactive these could be quite large in places.

This will not pose much of a threat to the urban enviroment as we dont have much snow at lower elevations. This is a primary concern for backcountry users.

Choose your terrain wisely today. Avoid windloaded areas.

Secondary Trend:1
Secondary Probability:6
Secondary Likelihood:3
Secondary Size:2
Secondary Description:

At lower elevations the snowpack is quite isothermal. Wet Loose, Wet Slab, and Glide avalanches all remain possible.

Time heals all things. As tonights cooling brings colder temps for tomorrow this weakness should start to build strength once again.


The National Weather Service Forecasts-
Today- Windy in the morning, rain. Highs around 44. Southeast wind 30 mph with gusts to around 55 mph decreasing to 10 to 20 mph in the afternoon.

Tonight- Rain. Lows around 38. East wind 10 to 20 mph.

Saturday- Windy. Rain...heavy at times. Highs around 42. South wind 15 to 25 mph. Gusts to 45 mph

Temperatures remain quite warm around the region. This morning the Eaglecrest base is showing 37f. Mid Mountain is 34f and the summit is right at 32f. Mt Roberts is holding at 35f.

Winds continue to blow quite hard around the region. Currently the tram is blowing 40 gusting to 50mph while Eaglecrest is even stronger showing 45mph winds with 70mph gusts.

Precip totals were lighter than expected yesterday. Mt Roberts received 13mm while Eaglecrest picked up closer to 18mm.

The Eaglecrest powder patch gauge is showing that translated to around 6cm of new snow. I am sure that is quite wet snow at that. But you can assume the quantities are even higher in wind sheltered areas closer to summit at higher elevations.

The lower elevation snowpack is quite moisture saturated and isothermal for the most part. At low elevations you may see wet loose avalanches... or wet slab avalanches... even climax or Glide avalanches have a possibility of occurring at mid to lower elevations.

At upper elevations with this little bit of new snow and 40-70+mph winds be aware of windloading and windslabs on the lee of the slope.

The forecast calls for a few degrees of cooling over the next 24 hours, continued high winds and continued precipitation (around 15mm).

Recognizing that natural avalanches are possible... and human triggered avalanches are likely in windloaded areas at upper elevations avalanche danger is CONSIDERABLE at this time.


Today we will give you a little humor and see who is paying attention.

Alp: One of a number of ski mountains in Europe. Also a shouted request for assistance made by a European skier on a U.S. mountain. An appropriate reply: ?What Zermatter??

Avalanche: One of the few actual perils skiers face that needlessly frighten timid individuals away from the sport. See also: Blizzard, Fracture, Frostbite, Hypothermia.

Forecaster:Tom Mattice