"Today, in Escazu Costa Rica - the skies opened up as if it were the end of times - It was truly a beautiful glimpse of what our God has in store for us on the day he comes back.
Jessielou121
According to the Washington Post:
This is a pileus cloud, sometimes called a “cap” cloud because of the way it caps the top of the cumulus cloud. They typically form during the early stages of thunderstorm development, when a strong updraft of rising air is present in cumulus clouds. The upward motion of the building cumulus cloud causes the whole layer of air above the storm to rise. The moisture in this thin layer cools and condenses into cloud droplets, which forms the wispy, flat cloud that caps the storm.
The colorful iridescence doesn’t always accompany pileus clouds , but it’s caused by the same thing that causes rainbows, when sunlight passes through the small cloud droplets and is reflected and refracted into distinguishable colors.
The best way to spot these clouds are during the early stages of thunderstorm development, but you have to be vigilant since they don’t typically last very long. The iridescence can be seen when the sun is positioned behind the building storm clouds so that the refracted light can pass through the pileus and to your eyes.
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