www.asp.usatoday.com/weather/weatherfront.aspx
http://ww2010.atmos.uiuc.edu/(Gh)/guides/mtr/home.rxml
www.met.tamu.edu/class/Metr304/Exer10dir/classification.html
www.usatoday.com/weather/wcloud0.htm
www.bsu.edu/web/kapeto/About%20Page.html
http://vortex.plymouth.edu/clouds.html
http://pals.agron.iastate.edu/carlson/main.html
