Dropping temperatures prompted Gallatin National Forest avalanche experts to raise the avalanche danger in south central Montana to considerable Saturday morning.

Officials say gusting wind and light snow will worsen the conditions of the already unstable snowpack. Human triggered avalanches are likely.

The Bridger Range, Gallatin Range, and Madison range along with the Lionhead area are included in this warning. Parts of Cooke City also appeared unstable.

The warning does not apply to nearby operating ski, areas.

To follow the advisory, visit the Gallatin National Forest Avalanche Center website.