Fire cloud floats above Earth in rare pictures

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It looks like a sci-fi vision of another world…

But it’s actually the blazing heart of a fire cloud floating above our own planet.

Fire clouds floating over Washington State in August 2019. Picture: David Peterson / U.S. Naval Research Laboratory

The image, shared online by NASA Earth Observatory (NEO), was snapped in the sky over eastern Washington state at an altitude of about 30,000 feet (9 kilometers) as a NASA pilot flew into a so-called fire cloud.

This phenomenon, also known as a pyrocumulonimbus or PyroCb cloud, occurs when heat and moisture from wildfires rise up into the atmosphere and form smoke-filled thunderclouds atop the fire’s plumes.

In the photo, taken on Aug. 8 at 8 p.m. local time, puffy, white clouds hover in the right side of the picture in a horizontal strip of bluish light, while the top and bottom of the image glow orange. The sun glows in the upper left corner, transformed by an orange halo; particles from the fire far below reflect light and lend the sun its orange color.

Though they may be beautiful, fire clouds are also disruptive. When wildfires generate thunderstorms, those billowing clouds act like chimneys, funneling smoke and particles into the lower stratosphere, the atmospheric layer between 6.2 miles (10 km) and 31 miles (50 km) above Earth’s surface. These materials get funneled in quantities that are comparable to those of an erupting volcano. A single fire season in western North America can generate up to 25 intense fire-cloud events.

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These fire clouds are caused when fires loft enough heat and moisture into the atmosphere to produce thunderstorms. Picture: David Peterson / U.S. Naval Research Laboratory

Lightning strikes that hit on Aug. 2 ignited the wildfire at William Flats in the Colville Indian Reservation near Spokane, Washington. The fire spread quickly across more than 10,000 acres (40 square kilometers), feeding on dry brush, timber and short grass. As of Thursday (Aug. 15), the fire had burned more than 45,000 acres (182 square km) of William Flats, but the perimeter was about 81% contained.

Images of large fire clouds are exceptionally rare, especially from the air. The views are absolutely stunning.

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