Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site allegra.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!jpl From: jpl@allegra.UUCP (John P. Linderman) Newsgroups: net.sci Subject: Re: Wind Chill Factor? Message-ID: <2669@allegra.UUCP> Date: Sun, 5-Aug-84 14:55:28 EDT Article-I.D.: allegra.2669 Posted: Sun Aug 5 14:55:28 1984 Date-Received: Mon, 6-Aug-84 01:09:44 EDT References: <244@parallel.UUCP> Organization: AT&T Bell Laboratories, Murray Hill Lines: 17 Here's a formula I pulled out of the New York Times a few years ago. I can't vouch for its accuracy. The sign change at high velocities is disturbing in the abstract, but since the reversal occurs around 100 meters per second (223 miles per hour) the formula may well be correct for conditions most of us will experience. [In a 220 mph wind, frostbite is probably less of a concern than where you will come down.] v = wind velocity in meters / second t = temperature in degrees Celcius skin temperature is approximately 33 degrees C heat loss in kilocalories / square meter is 1/2 ( 10 * v + 10.45 - v ) * ( 33 - t ) John P. Linderman Department of Obscure Formulae allegra!jpl