Cumulonimbus clouds are very tall and so block out quite a bit of sunlight, causing them to appear dark when viewed from below.
Light being blocked by water droplets in the cloud.
They are often dark when viewed from below, but when observed from a distance or from above, they appear white just like any other cloud.
cumulonimbus
This is called a cumulonimbus cloud.
you will see Cumulonimbus clouds before a tornado which are large, dark, anvil-shaped clouds.
Light being blocked by water droplets in the cloud.
They are often dark when viewed from below, but when observed from a distance or from above, they appear white just like any other cloud.
What causes a cumulonimbus cloud is the cold and warm fronts that colided.
cumulonimbus
Cumulus clouds don't so much appear in tornadoes. It is more accurate to say that tornadoes descend from cumulonimbus clouds.
A cumulonimbus cloud would usually appear on a hot, humid summer day. As these clouds build up, you then get a thunderstorm.
cumulonimbus
cumulonimbus
A cold front
A Cumulonimbus Cloud
cumulonimbus
Yes. They are the massive dark clouds that produce lightning.