Avalanche Advisory Archive 2016 – 2018

Date Issued:2017-01-30 06:25:39
Primary Trend:1
Primary Probability:3
Primary Likelihood:1
Primary Size:2
Primary Description:

With a week of 20-60mph winds during light snows we have built numerous windslabs around the region.

For the most part the temps cooled during the tail of the event which should help with stability.

Yesterday both small natural and human triggered avalanches spotted around the region. Things shoud continue to stabilize but be aware danger will linger a little longer.

Secondary Trend:1
Secondary Probability:9
Secondary Likelihood:1
Secondary Size:2
Secondary Description:

The odds of glide avalanches are not very good today. For the most part the current snowpack is mostly stable with the exception of the windslabs...

Be aware of glide cracks in the region. Watch any slope with cracking for long term danger. Glide avalanches can occur at any time and forecasting for them is very difficult. Keep an eye out for areas of glide and simply avoid them. They are dangerous and will eventually fail.


The National Weather Service Forecasts-

Today- Partly cloudy. Highs around 31. Light winds.

Tonight- Mostly clear. Colder. Patchy freezing fog. Lows 16 to 22. Light winds.

Tuesday- Partly cloudy. Highs around 30. North wind 10 mph.

Temperatures continue to fall around the region. Yesterday Mt Roberts Tram saw a daily high of 29f. Eaglecrest was a bit cooler at 27f. This morning we show the Eaglecrest base at 21f. Mid Mountain is at 20f and the summit is showing 21f as well. Mt Roberts is slightly warmer at 26f currently.

Winds remained strong yesterday morning during the tail end of the storm. We only saw a few inches of snow at upper elevations yesterday. But we actually had several days with small snow amounts at the highest elevations in our region. The combination of these small snowfalls combined with heavy winds created serious windloading in places around the region. Yesterday there was even evidence of some shallow natural avalanche activity in places.

Recognizing that natural avalanches occurred in places yesterday we may still have some ability for human triggered avalanches in places. These are most likely found only at upper elevations.

Avalanche danger is Low to MODERATE today. With calm winds, cooling temperatures, and no precipitation in the forecast natural avalanches are not likely yet human triggered avalanches remain possible in isolated locations.

These cooler temps and time have allowed the snowpack to drain and start to solidify. This lower snowpack should be quite stable in place.


Here is a link to a quick short article with reminders on:

How To Search With Your Avalanche Beacon.


Forecaster:Tom Mattice