* WHAT...Unusually dangerous avalanche conditions will persist through the weekend. Human-triggered avalanches are likely, with natural avalanches possible.
* WHERE...The Whitefish, Swan, Flathead, and Apgar Ranges, and the Lake McDonald and Marias Pass areas in Glacier National Park.
* WHEN...In effect from Thu 06:00 MST to Sun 18:00 MST.
* IMPACTS...Persistent weak layers buried two to three feet deep remain sensitive to the weight of a person or snowmachine. Avalanches have released on these layers since early February. In the past week, riders have reported four accidents (riders caught, carried, partially or fully buried) involving these persistent weak layers. Slabs can be triggered from long distances away. Avalanches may connect across terrain features like ridges, releasing multiple start zones at once. The layers - and the likelihood of triggering an avalanche - are most widespread on slopes facing west through north to east.
* PRECAUTIONARY / PREPAREDNESS ACTIONS...Plan backcountry trips to avoid travel on or under steep slopes in the northern half of the compass. When riding, pay close attention to the terrain around you. Avoid riding under steep start zones, stop in spots that are out of avalanche paths, and steer clear of steep slopes above terrain traps like gullies, creek beds, stands of trees, and cliffs. Monitor the avalanche forecast and observations regularly.
Consult http://www.flatheadavalanche.org/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.
************************************************************************************
Check out our online trail guides:
- Glacier National Park: HikinginGlacier.com
- Grand Teton National Park: TetonHikingTrails.com
- Rocky Mountain National Park: RockyMountainHikingTrails.com
- My new edition on the history of hiking is now available on Amazon
No comments:
Post a Comment