How Pyrocumulonimbus clouds are formed when wildfires spit storms, lightning Sub: Geo Sec: Climatology Increasing Frequency of Pyrocumulonimbus Clouds Due to Wildfires: Intense wildfires in the US and Canada are generating ‘pyrocumulonimbus’ clouds, which can produce thunder and potentially ignite new fires. The frequency of these clouds has risen significantly, with Canada recording […]