99% humidity?

[Ari]

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!?

[driverrob]

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.

[davepoth]

Saying 99% is a bit daft really; they should just give the mist forecast it entails, since that means something to people.

[Alice Cupra]

Ari said:

surely 100% humidity is pure water and we'll all drown!?

I've always thought that should be the case.......

[Vieste]

It was hot today up north was close to drinking my own piss walking back home.

[Ari]

As opposed to who's!?

[TheHeretic]

Ari said:

As opposed to who's!?

Someone else's, obviously.

[kiteless]

Bear said:

It was hot today up north was close to drinking my own piss walking back home.