All the talk lately about what the wind chill temp is in different parts of the country reminded me of what they used back in the day. They didn't bother breaking it down to the degree, instead it was grouped in 'Wind Chill Factors'. There were 4 Wind Chill Factors with 4 being the most severe. The chart would have various shaded areas for the different Wind Chill Factors. The one below is almost like the ones I remember as it is the only one I could find that had 4 zones as to 3 on the other charts I was able to find.
One amusing tale from my time in the land of Mainiacs concerning the Wind Chill Factor. One time they decided to play war games (practice how long it would take to load weapons on our fighters) when the Wind Chill Factor was 4 in which exposed flesh freezes in seconds. As my specialty as a tin tacker (tin bender, whatever) wasn't needed for anything on the airplanes, they had me manning the speedy dry cart. Speedy dry or oil dry is like cat litter and used to soak up oil and other liquids that may spill on the ground so people won't slip in it. On this particular day there wasn't an ounce of speedy dry on the entire base let alone on the speedy dry cart I was manning. If I remember correctly, I even had to go thru the motions of using the imaginary speedy dry while I was out there freezing my ass off!!