Largest In-Bounds Avalanche in Resort's History Observed in Colorado

Steamboat patroller Matt Hartsel filed a field report with the Colorado Avalanche Information Center (CAIC) that provides further details.

Hartsel estimates that the crown of the slide was more than 1,000 feet wide, and that it, "ran on early November faceted snow". In layman's terms, a weak layer of early-season snow was unable to support the dense snowfall of the November 25-27 storm. 

The slide occurred below treeline on a North aspect, was a Soft Slab, and was deemed a Size 2.5. That's large enough to bury, injure, or kill a person, according to the CAIC.

At some point (the exact time is unknown) this weak layer finally gave way, and the massive avalanche released. This resulted in a perfect storm, of sorts, to create Steamboat's largest in-bounds slide in their 60+ year history.

As of Thursday, December 5, 2024, the CAIC has slightly toned down their avalanche warnings in the Steamboat area as the snowpack begins to heal, but 'Level 2-Moderate' Danger Scale warnings remain at and above treeline. Here's more from the CAIC about the current avalanche risk in the region:

"You can trigger an avalanche on west to north through southeast-facing slopes where you find a cohesive slab resting on weak snow near the ground. Slopes with wind-drifted snow are the most dangerous and where you can trigger the largest avalanches. You may not see any signs of instability before you trigger an avalanche. Low-angle and wind-sheltered slopes are safer options."

Early-season skiing and riding is exciting, there's no denying it. The feeling of sliding on snow once again, however, can lead us to make poor decisions.

Let Steamboat's massive avalanche, and subsequent public service announcement, be a reminder to keep your head on straight.

Don't duck ropes. Obey all trail closures. Treat your local ski patrollers with respect. If you're venturing into the backcountry, check your local avalanche forecast, pack all the necessary gear (beacon, shovel, probe), and create a plan.

Most importantly, stay safe out there, friends. The season is just getting underway. Let's look out for each other so we all have long and prosperous seasons!

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