This is not an exhaustive list but below are some websites members have shared over recent days that have information they found useful about the Great American Eclipse.
Eclipse websites
https://www.space.com/33797-total-solar-eclipse-2017-guide.html
https://eclipse2017.nasa.gov
https://www.timeanddate.com/eclipse/map/2017-august-21
https://www.greatamericaneclipse.com
http://www.skyandtelescope.com/total-solar-eclipse-august-2017
https://www.celestron.com/pages/2017-eclipse-watch#
https://www.nps.gov/subjects/naturalphenomena/2017eclipse.htm
http://www.eclipse2017.org
http://www.eclipse2017.org/2017/weather/2017_clouds.htm