How Does Dew Form?

What is dew? What is frost? How do they occur? NorEasterNick explains that and more in this lesson from NorCast Weather School.

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[ZeeshanMakhdoom]

Thanks for illustrating it in so simple way.

[joshuamathers]

Down to earth bro. Very informational. Question, where does the water come from. Obviously, dew first thought, I think of grass and glass. Glass doesn't have much moisture. Where grass does. So I guess the water comes from the air. Humidity, correct? And what is liquid water? Isn't all water liquid?

[nikanj]

How does a surface cool below ambient? Once it reaches the ambient air temperature wouldn't the surface not be able to cool any further because energy from the air will transfer into the surface?

[joshuamathers]

If I go outside in the morning when it's dewy do I not have to drink water that day?