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RE: [at-l] Weather



 Anyone know what "relative humidity" means?  Relative to *what* is my
> question.
>
It is relative to how much water the air could contain at that temperature.
If it is 100% it can hold no more and hence it rains (or snows). Similarly
the dew point is the temperature at which the current air will become 100%
saturated and start condensing on cool objects.

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