A little bit about the clouds

Stratocumulus

If you took an imaginary knife and spread cumulus clouds together across the sky but not into a smooth layer (like stratus), you'd get stratocumulus—these are low, puffy, grayish or whitish clouds that occur in patches with blue sky visible in between. When viewed from underneath, stratocumulus have a dark, honeycomb appearance. 

When You'll See Them

You're likely to see stratocumulus on mostly cloudy days. They form when there's weak convection in the atmosphere.

https://www.thoughtco.com/types-of-clouds-recognize-in-the-sky-4025569

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