Thursday, August 7, 2008

Heat Index

On the Hood River Weather site, just under the current temperature, is something called "heat index", otherwise known as the "feels like" temperature. I put it there in the summer in place of "wind chill", which obviously is more of a cooler weather thing.

But, generally speaking, our heat index has been totally unimpressive. It always shows either the current temperature or lower. Some heat index THAT is...

Until the past two days...


A lingering heat wave combined with moisture streaming up from the Southwest has made for hot humid afternoons. Pretty unusual for Hood River. And, the heat index has actually been higher than the actual temperature!! Yes!!

At one point today, the outside temperature was 86, and the humidity was 50%, making for a heat index "feels like" temperature of 89.

Now, people who live in more humid areas of the world would laugh their butts off at this small Hood River heat index. In Florida, for example, try 95 degrees at 75% humidity for a heat index of 110 degrees.

It turns out that, in Hood River, the heat index hardly ever applies. It only takes effect at temperatures of 80 degrees or higher with a relative humidity of 40% or higher. These combined conditions, thankfully, are quite rare here.

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