Skip to content
Skip to the forecast
Forecasts supported by
Forecast
Northwest Mountains
Southeast Mountains
Weather Forecast
How to read the forecast
Archives
Observations
Submit Your Observations
View Observations
View Avalanches
View Avalanche Patterns
Weather Stations
Weekly Snowpack Summaries
News and Events
Education
Find An Avalanche Course
Danger Scale
Avalanche Problem Definitions
Avalanche Encyclopedia
Resources
About Us
Avalanche Terrain Map
Get the Avy App
Human Involvements this Season
Past Accidents
CBAC Zones and Placenames
Archives
Forecasts
Observations
2025-26 Observations
2024-25 Observations
2023-24 Observations
2022-23 Observations
2021-22 Observations
2020-21 Observations
2019-20 Observations
2018-19 Observations
2017-18 Observations
2016-17 Observations
2015-16 Observations
2014-15 Observations
Weekly Summaries
Weekly Snowpack Summaries Archives: 2024 to Present
2023-24 Weekly Snowpack Summaries
2022-23 Weekly Snowpack Summaries
2020-21 Weekly Snowpack Summary
2019-20 Weekly Snowpack Summary
2018-19 Weekly Snowpack Summaries
2017-18 Weekly Snowpack Summaries
2016 – 17 Weekly Snowpack Summaries
Annual Reports
2025-26 Annual Report
2024-25 Annual Report
2023-24 Annual Report
2022-23 Annual Report
2021-22 Annual Report
2020-21 Annual Report
2019-20 Annual Report
2018-19 Annual Report
2017-18 Annual Report
2016-17 Annual Report
2013-14 Annual Report
2011-12 Annual Report
Donate / Join
Forecast
Northwest Mountains
Southeast Mountains
Weather Forecast
How to read the forecast
Archives
Observations
Submit Your Observations
View Observations
View Avalanches
View Avalanche Patterns
Weather Stations
Weekly Snowpack Summaries
News and Events
Education
Find An Avalanche Course
Danger Scale
Avalanche Problem Definitions
Avalanche Encyclopedia
Resources
About Us
Avalanche Terrain Map
Get the Avy App
Human Involvements this Season
Past Accidents
CBAC Zones and Placenames
Archives
Forecasts
Observations
2025-26 Observations
2024-25 Observations
2023-24 Observations
2022-23 Observations
2021-22 Observations
2020-21 Observations
2019-20 Observations
2018-19 Observations
2017-18 Observations
2016-17 Observations
2015-16 Observations
2014-15 Observations
Weekly Summaries
Weekly Snowpack Summaries Archives: 2024 to Present
2023-24 Weekly Snowpack Summaries
2022-23 Weekly Snowpack Summaries
2020-21 Weekly Snowpack Summary
2019-20 Weekly Snowpack Summary
2018-19 Weekly Snowpack Summaries
2017-18 Weekly Snowpack Summaries
2016 – 17 Weekly Snowpack Summaries
Annual Reports
2025-26 Annual Report
2024-25 Annual Report
2023-24 Annual Report
2022-23 Annual Report
2021-22 Annual Report
2020-21 Annual Report
2019-20 Annual Report
2018-19 Annual Report
2017-18 Annual Report
2016-17 Annual Report
2013-14 Annual Report
2011-12 Annual Report
Donate / Join
Submit Observation
Donate
December 21, 2015
12/21/15 Natural avalanche activity near Crested Butte
← All news & observations
Today’s avalanche forecast
