When the weather report say: " the humidity is 70% today, but tomorrow it should be 50%" Does it mean the 50% of the air is made up by water molecules? Or is it entirely something else? this might be a dumb question and no I haven't wiki'd it yet.
Originally posted by ysterbaard When the weather report say: " the humidity is 70% today, but tomorrow it should be 50%" Does it mean the 50% of the air is made up by water molecules? Or is it entirely something else? this might be a dumb question and no I haven't wiki'd it yet.
Yes. That's why I want to know what is the meaning of the term "50% humidity" and how is it calculated. And what happens at 100%. Obviously it cannot be that at 100% humidity air turns into water. Except if you go by wheight. Where a drop of water weighs as much as a whole lot of air. So if at 100% humidity a raindrop falls out of the sky. Still I would like a proper answer.
Originally posted by mtthw http://en.wikipedia.org/wiki/Humidity#Relative_humidity
I think that means it's the percentage of the maximum level of humidity that the air could sustain at that temperature.
Yes. At 100% humidity, it starts to rain. The actual amount of water air can hold is temperature and pressure dependent; that's why sunny weather tends to coincide with high pressure.
Originally posted by KazetNagorra Yes. At 100% humidity, it starts to rain. The actual amount of water air can hold is temperature and pressure dependent; that's why sunny weather tends to coincide with high pressure.
So the part of rain that actually contains the water would be a lot more than 100% humid wouldn't it?
26 Jan '10 08:34
Humidity question
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