Yellowstone: Danger Thermal Area

Thermal area near West Thumb on Yellowstone Lake
Yellowstone National Park - Wyoming, United States

Yellowstone National Park - Wyoming, U.S.

Roaring Mountain, Yellowstone National Park - Wyoming, U.S.

Yellowstone National Park - Montana, U.S.

Storming over the Grand Tetons Range - Wyoming, U.S.

To give you an idea of just how dark and impressive the storm was,
this is the same shot as the previous but taken in color