They give plenty of warning--broad, high cirrus anvils blown far downwind from the tops of the storms, and soaring, huge mounds of towering
cumulonimbus easily visible in double-digit visibilities.
These are related to showery weather and examples are
cumulonimbus and cirrocumulus.
As I passed south of Cleveland, on my right was a large
cumulonimbus cloud pouring rain down on Cleveland.
Domes form as the upward current continues, the water vapour often forming turrets which generate towering cumulus and
cumulonimbus. The sunlit parts are brilliant white, and reach up to a height of 6,000 metres.
In the afternoon across west Bulgaria, and by midnight over the central part of the Danubian Plain,
cumulonimbus clouds will gather, bringing rain showers accompanied by thunder, and possibly hail.
There were patches of rain and, although tops were obscured,
cumulonimbus development was a likely part-and-parcel member of this cloud band.
A weather forecaster said the rains were a sudden development of
cumulonimbus clouds over the city that also gave rain to adjacent areas in Abu Dhabi.
Then, in spring, when the sun is warming the earth but the air is still cool, great towering
cumulonimbus clouds often develop and these can become thundery.
In the afternoon,
cumulonimbus clouds will gather, bringing showers, at times heavy and accompanied by thunder, to isolated places, mainly in western and central Bulgaria.
Intensely active
cumulonimbus builds very rapidly, the turbulence within such a cloud sees clashing vertical upthrusts and downdraughts immediately alongside each other and even meeting head-on so driving the downdraught forcibly aloft, by tens of thousands of feet, well above the freezing level, hailstones will already be present and such activity sees collision and accumulation.
The moisture condenses and forms
Cumulonimbus clouds that support lightning and thunder.
This was the question posed the last time I dared to venture there, nursing a wiffy pint of
cumulonimbus cloud quality, destined to be left unfinished amid the wash of ``gorrennie'' beggars, ``wannennie'' salesmen of quality odd socks, flamethrower lighters and prosthetic limbs and the general meffing and blinding being bandied across the bar.
