FOX 7 Austin's Carlo Falco explains how extreme heat from a wildfire can produce dangerous clouds.
The Big Sky Fire in Gillespie County even got big enough to produce clouds.
The extreme heat from a wildfire carries the smoke rapidly upwards and if there's any instability in the atmosphere a cloud can form. That cloud is called a pyrocumulus cloud and is an indication of extreme fire behavior. Wildfires can burn at temperatures hotter than 15,000 degrees which means the fire will always create some buoyancy.
It comes from the trees and brush. Even in a severe drought, plants have lots of water inside them. Burning an entire forest evaporates literally tons of water contained in the trees, grass and brush.
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