I understand that fog is denser mist, and that essentially, it’s all just water vapour. But so are clouds. So why is water vapour sometimes at ground level? Why is it only sometimes? Why is it usually albeit not always at night? What makes it happen? And what makes it NOT happen?
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Imagine you’re taking a hot shower, and when you step out, you see the bathroom mirror is a little cloudy. That’s because the warm water made tiny water droplets in the air. Fog and mist are a bit like that, but outside!
Fog is like a big blanket made of tiny water droplets that sits close to the ground. It happens when the air near the ground gets really cool and meets warm, moist air. This makes the tiny water droplets stick together and form fog.
Mist is like a lighter version of fog. It’s made of really tiny water droplets that float in the air. It often happens in the morning when the ground is still a bit cool from the night, and the sun starts to warm things up.
So, fog is like a thick, low cloud that hugs the ground, and mist is like a light, airy cloud that’s not as thick. They both happen because of the way the air and water mix together.
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