Danger Scale

GNFAC Instagram

We visited a large avalanche on Henderson Mountain that broke yesterday afternoon, Feb. 15 2019. We do not expect widespread avalanches like this near #cookecity, but it is wise to avoid heavily wind loaded slopes where these are possible, especially during heavy loading from snow and wind. The more likely type of avalanche is fresh drifts of snow 1-2' thick on recently wind loaded slopes. video at https://youtu.be/oOjaEWyCVdI and http://www.mtavalanche.com #gnfacobs
We visited a large avalanche on Henderson Mountain that broke yesterday afternoon, Feb. 15 2019. We do not expect widespread avalanches like this near #cookecity, but it is wise to avoid heavily wind loaded slopes where these are possible, especially during heavy loading from snow and wind. The more likely type of avalanche is fresh drifts of snow 1-2' thick on recently wind loaded slopes. video at https://youtu.be/oOjaEWyCVdI and http://www.mtavalanche.com #gnfacobs
This slide appeared to be a natural triggered by a falling cornice. It broke near the ground and propagated a few hundred feet wide. This is a clear indicator that large and dangerous slides remain possible in the southern mountains. #gnfacobs
This slide appeared to be a natural triggered by a falling cornice. It broke near the ground and propagated a few hundred feet wide. This is a clear indicator that large and dangerous slides remain possible in the southern mountains. #gnfacobs

GNFAC News

February 2, King and Queen of the Ridge at Bridger Bowl (fundraiser). Register with Bridger to hike in the event, and create a pledge page to raise funds with your Ridge laps.

Check out the latest updates from the GNFAC: a new forecaster, and new and updated pages to the website.

Doug wrote an article for the upcoming Avalanche Review about our education efforts in Cooke City and the the Centennials (ID and MT).

After last season's two snowmobiler avalanche fatalities on Reas Peak in the Centennial Range we created a webpage so riders could get good, relevant information regarding snowpack and avalanches.

Resources

Weather Stations

Weather Stations provide the GNFAC forecasters with information on snowfall, wind and temps from around the region. The Weather Log summarizes this daily.

Avalanche Education

GNFAC partners with groups around the region to provide evening avalanche classes, plus full day and multi-day courses, including some weekend field days. All our class offerings, along with courses from other providers, are on our Education Calendar.

Placenames

Use this map to find the locations of unfamiliar places mentioned in the advisory. Also take a look at our glossary of avalanche terms.

Support

Donate to the Friends of GNFAC; or order DVDs or 'Snow Sense' avalanche safety handbook.