California's Wildfires Are Forming A Newly Classified Type Of Cloud

[Judi Lynn]

Parts of the California wildfires are so hot that they're helping form aptly named pyrocumulus clouds.
By Tyler Adkisson
December 8, 2017

In some parts of California, wildfires are getting so hot, they're forming clouds commonly associated with volcanoes.

Pyrocumulus clouds had been spotted before the most recent wildfires but weren't formally recognized until early 2017, when the World Meteorological Organization updated its cloud atlas for the first time in 30 years.

Pyrocumulus clouds start forming like any other cumulus cloud: The sun heats Earth's surface, which pushes columns of warm air above denser, cooler air. This warm air eventually cools off and condenses into a cloud.

But a wildfire can make the process even more spectacular. Burnt plants release water into the atmosphere. The rising water vapor and warm air condense around particles of smoke from the fire.

More:
https://www.newsy.com/stories/california-wildfires-forming-newly-classified-type-of-cloud/

[lapfog_1]

1. I drove from Modesto to Merced on 99 yesterday

Across the western horizon (southwestern) was a dark looming cloud. And the slight smell of wood smoke. It was near sunset and the sun disappeared in a orange haze.

[DemoTex]

2. I've been photographing pyrocumulus clouds for years .. and calling them "pyrocumulus."

Pyrocumulus cloud forms at sunset over the "Pole Creek" fire, in the Sisters Wilderness, in September 2012. The Three Sisters and Broken Top are the Cascade Range mountains to the left.

Deschutes National Forest
Oregon

[Canoe52]

3. KnR