These canisters smashed on striking the ground--they did not explode--and incontinently disengaged an enormous volume of heavy, inky vapour, coiling and pour- ing upward in a huge and ebony cumulus cloud
, a gaseous hill that sank and spread itself slowly over the surrounding country.
From his bed he could see the great cumulus clouds
that hung in the blue sky.
It's rare, however, to have such a cumulus cloud
deck without sufficient holes to descend.
The second is the potent convection which produces towering cumulus cloud
The skeptics doubted that seeding agents dispersed at the base of a tall cumulus cloud
could wend their way 5,000 to 12,000 feet up, to the part of the cloud that contains moisture droplets.
For the Windhoek area on Tuesday, sufficient daytime heat resulted in higher level cumulus cloud
One minute you think you are flying below or in the base of a harmless cumulus cloud
only to find out that 10 minutes later, what looked like a harmless cloud now has a billowing tower starting to build its anvil shape.
These two interacting systems allow widespread cumulus cloud
to develop, with a reasonably low cloud base, some 3500 to 4000 feet above surface, and build into an air mass drifting gently from the northeast bringing in tropical air in a layer at least 20000 feet thick.
Deep convection, or a thunderstorm, requires a similar environment except that some form of outside energy contribution is always required to take a congested cumulus cloud
to the mature thunderstorm stage.
While this air parcel may be saturated or unsaturated, picture the air parcel as a typical, white, puffy, fair-weather, cumulus cloud
The smaller droplets collide and coalesce into larger droplets and grow to a size greater than 50 microns especially near the top of the cumulus cloud
On a recent flight home, we were cruising along at 7000 feet in good weather, except for the occasional encounter with the very top of a cumulus cloud