Wednesday - August 01, 2012

Swampy

It rained like Gosh Almighty around 5am here. Woke me up, and I usually sleep like a log.

Sun is out now, a little, and it’s not hot out, or even all that warm. About 70°F. But the humidity is right up there near the saturation point, 90% or thereabouts. Which means it’s another typical New Jersey super sticky summer day in the making. You feel uncomfortable even when it’s cool, because you can’t evaporate any moisture and there’s never any air movement.

I went and looked up that Heat Index thing this morning. It doesn’t even apply unless it’s 80 out or hotter! That sucks.  But a bit more looking about lead me to some info about the dew point that seems to be usable. Whenever the dew point is getting close to 70°F, or higher, it feels swampy. And I don’t like swampy. Currently our dew point is 68°F. That’s high enough in my opinion.

Another way to measure how hot it feels outside is to use the dew point temperature. The dew point temperature is an indicator of the absolute humidity — if the temperature drops to the dew point temperature, water vapor condenses to dew. No matter what the actual outside temperature is, most people begin to feel uncomfortable when the dew point approaches 70 degrees, and dew points above 70 degrees are oppressive.

What this chart really shows is that it’s got to be fairly dry to be comfortable when the weather gets hot. Somewhere there ought to be the winter version but I’m not sure how that one would work. High humidity and cold temps will cut right through your warm clothes, chilling you to the bone. I’ve noticed that blue jeans are especially sensitive to this. The weather folks always give us Wind Chill, but what we need just as much is something that deals with the moisture levels. 

Posted by Drew458     on 08/01/2012 at 07:45 AM   
Filed Under: • Climate-Weather •  
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