You’ve seen billowy cumulus clouds and wispy cirrus clouds, but odds are you’re not too familiar with fire clouds. Even scientists know less than what they'd like to about so-called pyrocumulonimbus (pyroCb) clouds, which form when wildfires and agricultural fires unleash enough heat and moisture into the atmosphere to produce storms.That changed on Aug. 8, when NASA’s airliner-turned-flying laboratory took to the skies over Washington state and flew a team of scientists straight into a pyrocumulonimbus cloud that had formed high over a wildfire in the eastern part of the state.MORE AT LINK