Wave clouds, Boulder, Colorado.

Wave clouds, Boulder, Colorado.

Wave clouds, northern Arizona.

Wave clouds, central Colorado.

Wave clouds, Indian Peaks, Colorado.

Wave clouds, eastern Colorado.

Wave clouds, northern Arizona.

Wave clouds, Boulder, Colorado.

Wave clouds, Boulder, Colorado.

Vortex clouds, Colorado Rocky Mountains.

Wave clouds, southern Utah.

Wave clouds, northern Arizona.

Wave clouds, northern Arizona.

Wave clouds, South Island, New Zealand.

Banner cloud, Mt. Sir McDonald, BC.