Pyrocumulonimbus clouds (pyroCb) are fire generated thunderstorms, a dangerous fire behaviour that occurs during extreme bushfires.
https://www.abc.net.au/news/2026-01-08/what-is-a-pyrocb-a-fire-generated-thunderstorm/106210552

#Bushfires #PyroCB

Black Summer and Pyrocumulonimbus clouds

Pyrocumulonimbus (pyroCb) clouds are thunderstorms that occasionally form above intense bushfire and transport smoke into the stratosphere

"PyroCb events are important sources of stratospheric aerosol. During the Australian forest fires in 2019/2020, such convective plumes transported quantities of smoke into the tropopause region comparable to those of a large volcanic eruption. In this study, we investigate the heat emission threshold at which wildfire plumes transition into pyroCbs."
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Impact of Sensible Heating and Water Vapor Emission on Pyro-Convective Plume Characteristics
https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JD043552
#FossilFuels #bushfires #Fires20192020 #fires #thunderstorms #smoke #stratosphere #PyrocumulonimbusClouds #pyroCb #ClimateDisruption #BlackSummer

Das Park Fire in #Kalifornien hat bereits 600 Quadratmeilen verbrannt und erzeugt gefährliche #Pyrocumulonimbus-Wolken (pyroCb). Diese #Rauchgewitterwolken können #Blitze erzeugen, die weitere Brände entfachen. PyroCbs entstehen durch intensive #Hitze und trockenen #Brennstoff und verstärken die #Feuer. #Klimawandel begünstigt ihre Entstehung, und sie beeinflussen das Wetter sowie globale Temperaturen durch die Absorption von #Sonnenlicht.

#ParkFire #Wildfire #PyroCb

https://grist.org/science/california-park-fire-spawning-smoke-thunderclouds-pyrocumulonimbus/

NSW, Australia bushfires: This may be the first pyrocumulonimbus (Pyro CB) of the 2023/24 summer wildfire season in Australia. Remember when these fire thunderstorms were rare events? They have become more common with the #ClimateCrisis

"A fire generated thunderstorm (pyro-cumulonimbus) has formed over the Glens Creek Rd Fire, Nymboida, 30km south west of Grafton. As a result, there is a potential for escalation in fire behaviour, with erratic winds, dry lightning and significantly faster fire spread."
#wildfire #bushfire #PyroCB

Report by NSW Rural Fire Service (NSW RFS) on X