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Ari
Original Poster
7,205 posts
84 months
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Just noticed on the weather forecast that it's projected to be 99% humidity tonight.
Hope they've not underestimated as surely 100% humidity is pure water and we'll all drown!?
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driverrob
2,957 posts
72 months
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No. % humidity is relative to the amount (proportion) of water vapour that can exist in equilibrium with air at a particular temperature.
e.g. in winter it might be 80% humidity at mid-day but, at much lower temperatures at night, that same amount of water vapour would exceed 100% so there will be condensation - mist/dew or hoar frost if it's below freezing.
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davepoth
19,903 posts
68 months
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Saying 99% is a bit daft really; they should just give the mist forecast it entails, since that means something to people.
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Alice Cupra
628 posts
106 months
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Ari said: surely 100% humidity is pure water and we'll all drown!? I've always thought that should be the case....... 
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Vieste
9,070 posts
29 months
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It was hot today up north was close to drinking my own piss walking back home.
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Ari
Original Poster
7,205 posts
84 months
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As opposed to who's!? 
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TheHeretic
67,941 posts
124 months
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Ari said: As opposed to who's!? Someone else's, obviously. 
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kiteless
6,281 posts
73 months
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Bear said: It was hot today up north was close to drinking my own piss walking back home. 
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