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LL2. This is a close view of actively developing Cumulus Congestus clouds during late morning and early afternoon due to heating of the ground and convection. They look like popcorns with clear outline. The color is whitish at the top because of all waves of the sun rays are reflected at the same proportion. The dark color is caused by limited penetration of the rays and also increased absorption of the remaining rays by bigger water droplets. With sufficient moisture and lifting these clouds grow tall and produce showers. Under deep unstable atmospheric conditions, afternoon or late afternoon thunderstorms can be expected.
LL3. Cumulus humilis, is the white clouds with limited extension. The inversion at the upper levels inhibits further growth of the cloud causing the spreading, hence the elongated appearance of the clouds. The diffusive/fibrous appearance at the top and the blue sky indicate dry air aloft. |
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