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Southern US Reaches Dangerous "Wet Bulb Temperature". Here's What That Means (www.iflscience.com)

submitted 2 years ago by [email protected] to c/[email protected]

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Multiple southern states and a few midwestern states are at "extreme threat" levels of "wet bulb temperature".

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[–] [email protected] 4 points 2 years ago

Basically you put two old-style thermometers next to each other. One has a conventional ‘dry’ bulb. The other has damp gauze or something similar wrapped around the bulb.

In low humidity conditions, the wet bulb thermometer will read considerably cooler as the evaporating water cools the thermometer

At 100% humidity the two thermometers will read the same, as no water will be evaporating.