Snoqualmie Pass

A very strong snowpack should create generally safe avalanche conditions Monday. While sunshine and warm weather may cause a few very small point release avalanches, these should not pose a significant threat. Instead, prepare for variable and often challenging snow conditions that may take time and patience to negotiate.

A strong snowpack exists across the Snoqualmie Pass region resulting in generally safe avalanche conditions. The Pass received 1-3” of snow early Sunday morning adding to a shallow layer of softer snow above the most recent surface crust. As the sun comes out and temperatures warm Monday, you may see this new snow shed from steep rocky faces and trees forming piles of new rollerballs and very small loose wet avalanches. Due to the limited amount of recent snow, these tiny slides should not pose a significant risk to backcountry travelers. While you may notice the sun softening the surface, we don’t believe it will breakdown the thicker crust layer below. As a result, any avalanche activity should remain in the most recent snow. 

Last week’s atmospheric river brought more than 5.5” of water to the zone and radically transformed the upper snowpack. Below the recent snow, you will find a firm and sometimes icy snow surface. The upper snowpack consists of alternating layers of stout crusts, refreezing melt-forms, and strong round grains. 

The greatest risk you face Monday could stem from variable and often difficult travel conditions. Recent reports highlight breakable crusts, icy slopes, frozen tree bombs, piles of avalanche debris, and open creeks. Make sure you allow extra time and bring the tools you need to manage these non-avalanche hazards. 

During the ongoing Covid-19 pandemic, continue to follow the latest guidance from local, state, and federal health officials. Avoid unnecessary risks that could impact first responders and stress medical resources. Wear a mask when appropriate, practice social distancing, and consider recreating closer to home.