http://www.weatherjackwilliams.com science writer and book author Mon, 06 Sep 2010 20:40:38 +0000 http://wordpress.org/?v=abc en hourly 1 http://www.weatherjackwilliams.com/archives/answers-inside-weather-fronts http://www.weatherjackwilliams.com/archives/answers-inside-weather-fronts#comments Sun, 22 Nov 2009 02:29:58 +0000 Jack Williams http://www.weatherjackwilliams.com/?p=1337 Q: In the November issue of AOPA Flight Training, you discuss extratropical cyclones, including the movement of cold air under warm air and vice versa. If I understand this correctly, the fronts themselves do not discriminate between the cold or warm air ahead of them.  How  do you explain movement under (cold into warm) or [...]]]> http://www.weatherjackwilliams.com/archives/answers-inside-weather-fronts/feed 1 http://www.weatherjackwilliams.com/archives/why-humid-air-is-lighter http://www.weatherjackwilliams.com/archives/why-humid-air-is-lighter#comments Fri, 05 Jun 2009 20:24:56 +0000 Jack Williams http://www.weatherjackwilliams.com/?p=654 Q: Why is humid air less dense than dry air? Matt, LaGrange, Ga. ]]> http://www.weatherjackwilliams.com/archives/why-humid-air-is-lighter/feed 0