It’s bitterly cold outside today. I’m not exactly sure what the high was, but I’ll bet that I could count it with my fingers. And the wind is a searing whip of pain that cuts through all types of clothing, even those labelled wind-proof or wind-blocker. I’m prepared though, having spent 4 years in Chicago as an undergraduate, and my experience has led me to all sorts of wonderful, futuristic materials (most anything that ends in ene, tex or max). Despite all of this, I’ve still been saying to myself quite a bit today, "goddamn it’s cold! But I’m sure it was colder in Chicago…"
In November of 2001 the National Weather Service changed their calculation of the long time standard wind chill index to diminish the effect of wind on perceived temperature. Apparently their original tests were based on empirical studies done on a glass of water while new tests were conducted on real humans in a chilled wind tunnel. The new formula, for those who care:
where T = air temperature (°F) and V = wind speed (mph)
National Weather Service: The wind chill index