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humidity = teh hawtness! er...

Today/tomorrow is supposed to exceed 100 degrees outside, during some storms and raining, and reach 100% humidity.

Having never experienced that before, I'm strangely looking forward to it.

Then of course, I'll turn around and walk back inside my air conditioned office, take my air conditioned car home at the end of the day and sit in my air conditioned house.

Werewolves are always so intimately in touch with nature. :)

- Keman


( 8 comments — Leave a comment )
Jul. 25th, 2005 06:02 pm (UTC)
Makes me homesick.

I lurve 100+ @ 100% & stormy (Can't really separate the third from the first two ;). There's no better weather, though there's lots that comes close in 'good'ness.

Jul. 25th, 2005 06:07 pm (UTC)
Well, to be nitpicky, if you have a temperature of 100 degrees and a very muggy dewpoint of 75 degrees, you'll still only be experiencing a relative humidity of 45 percent, even in a downpour. :)

Though, if the temperature falls later on to 75 degrees and the dewpoint remains constant, then you'll have 100% humidity.
Jul. 25th, 2005 06:21 pm (UTC)
That sounds like what happens here when it does reach 100%.

Basically it gets really hot, then it rains in the afternoon, and the temps drop a fair amount, but the sun doesn't come out. The air gets so thick you can see it, like fog except everywhere. The windows accumulate moisture on the OUTSIDE of an air conditioned car, and wiping the wiper blades doesn't do much good because a thin film of water remains on the windshield which does not evaporate even at speed. This is compounded at night, when the thin film actually makes it difficult to see with glare from oncoming headlights. The only solution is to spray your windshield down with washer fluid, which contains enough alcohol to wipe and evaporate. It comes back though.

Is 100/100% possible?

- Keman
Jul. 25th, 2005 06:44 pm (UTC)
Realistically, no. As far as I know the highest dewpoint recorded in the U.S. was 88 degrees, which at an air temperature of 100° (though it was probably lower at the time) would be 69% humidity. 90° is about the highest dewpoint you can get, but in most excessively humid areas like the Amazon or Borneo the temperature usually tops out in the low to mid 90s and dewpoints are in the 70s and 80s.

And an air temperature of 100° with 69% relative humidity would produce a heat index of 141°. Noooo thank you. :) I usually turn my AC on when it gets hotter than 75° :P
Jul. 25th, 2005 08:29 pm (UTC)
100/100% is more of an expression than a measurement. ^.~

You COULD theoretically see it, but you would need to be in a very wet, extremely hot locale, and the air would have had to cool to 100 degrees to saturate.

If the temperature / dewpoint spread is 0, you will have visible moisture at that point. If it's greater than zero, you can use that to determine what altitude at which the cloud bases are.

Trick we use in aviation to estimate cloud bases: ( temperature - dewpoint ) / 4.5 * 1000 + alt MSL = approximate height of cloud bases AGL.

On the other hand, I have indeed seen 85 / 100% humidity, which is basically heavy fog. In your neck of the woods, it's probably compounded by condensation nuclei / particulates in the form of smog, like a wet version of LA, though that probably damps the spread of particulates to some degree. ^^


Inside every pilot, there's a meteorologist waiting to get out.
Jul. 25th, 2005 08:31 pm (UTC)
Inside every pilot, there's a meteorologist waiting to get out.

Didn't know pilots were into vore...
Jul. 25th, 2005 06:07 pm (UTC)
Welcome to DC... all the humidity... all the hot summer long.

And people think I got this color by choice. ;)
Jul. 25th, 2005 08:49 pm (UTC)
Yes we never leave air conditioned comfort. AC is an aesome thing even if is turning us into Morlocks, but damn Eloi burgers are tasty.
( 8 comments — Leave a comment )


Galen Wolffit

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