Why do some clouds look silver or dark instead of bright white?
Quick Answer
Cloud color depends on how much sunlight gets through and how thick the cloud is. Thick clouds block more light, so their undersides often look gray or dark.
The Full Story
Clouds are made of tiny droplets or ice crystals that scatter sunlight. Thin clouds scatter enough light to appear bright white, but thick clouds absorb and block more sunlight from reaching the lower parts, making their bases appear gray or even dark. When a cloud contains a lot of water, the top may still be bright while the underside looks heavy and shadowed. This color contrast often signals a thicker cloud with a greater chance of rain.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Why do storm clouds go from white fluff to dark warning signs?"
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