Mammatus clouds over Half Dome on EarthSky | Today's Image

Mammatus clouds in Yosemite Valley on June 3, 2013 via our friend Kristal Leonard Photography.

Half Dome is a beloved granite dome in Yosemite National Park in California. It’s a granite crest rising more than 4,737 feet (1,444 meters) above the floor of Yosemite Valley. Kristal Leonard caught this photo of Half Dome topped by mammatus clouds on June 2, 2013. Thank you, Kristal!

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More amazing photos of mammatus clouds

Deborah Byrd

Deborah Byrd created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.