clouds that are common in Ghana contain ions that can lead to the crash of a flight.
The emergence of a cumulonimbus
is not necessarily accompanied by insects flying in an updraft so that the newly developed procedure needs to be honed further by taking into account other factors such as the level of humidity, experts say.
Tornadoes are formed when you get unstable air in a cumulonimbus
cloud with columns of air going both up and down.
Another type of twister, a tornado", says Wikipedia "is a violent, dangerous, rotating column of air that is in contact with both the surface of the earth and a cumulonimbus
The twister was likely to be a funnel cloud - condensed water droplets extending from the base of a cumulus or cumulonimbus
There have been videos of tornadoes forming, at their peak strength, and as they pulled back into the giant cumulonimbus
clouds from which they descended.
Met Office forecaster Andy Bodenham said: "These big stones are formed at the top of cumulonimbus
clouds where it's freezing cold.
Preoccupied perhaps with the cumulonimbus
, he allows the airspeed to dwindle as he climbs.
In many ways, says Fromm, pyroCbs are just like other cumulonimbus
clouds: They can provide prodigious amounts of precipitation and spawn a lot of lightning.
Such rain is caused mainly by cumulonimbus
clouds that form in a clash of warm and cold air.
If you are fishing well into the afternoon, keep an eye out for those cumulonimbus
Those cases include a Beechjet 400A that experienced dual flame-out at 38,000ft (11,600m) in November 2005 while flying in clear weather but near cumulonimbus
Above Martin, cumulonimbus
clouds moved over their lines, casting cool shadows.
Cloud nine is cumulonimbus
, which develops to a vast height, with rounded masses of white vapour heaped one on the other.
It said the plane had passed through tall, dense cumulonimbus