Creating their own weather systems
The hot, fast jets of rising air within pyrocumulus clouds tend to create a highly turbulent atmosphere, which can result in some unusual weather effects. -
If a cloud column builds high enough, for example, it can become a pyrocumulonimbus cloud — essentially, a fire-fueled thunderstorm cloud.
In humid conditions, such clouds can actually produce rainstorms that put out the fire that created them.
But in dry environments, like Southern California, rainfall is more likely to evaporate within the cloud itself, never reaching the ground. ⠀⠀
Even in the absence of rain, so-called "dry" lightning bolts can rip through the cloud or plunge to the surface, potentially sparking new fires.
Pyrocumulus clouds can also increase spotting, since you are lofting more embers higher into the atmosphere, which can increase the horizontal distance the embers travel, and if a large pyrocumulus column becomes too unstable, it may even collapse onto itself.
❗️A collapsing pyrocumulus cloud can have serious ramifications causing very strong and erratic winds at the surface and increase spotting as the embers reach the surface❗️
#fireweather #clouds Смотреть полностью