Thought I would pass along a few useful items.
NOAA has a site showing you odds of cloudiness. There is an interactive map further down on the page. Look at the legend first to see what the colors mean. The coloring makes the east coast look like a fog bank.
https://www.ncei.noaa.gov/news/ready-set-eclipse
The Smithsonian just realeased an IOS app for the Eclipse. It picks up on your phone's GPS gives you % of coverage at your location or time of totality at the location you plan to be at. Other apps out there, but this one is free without ads.
NASA has downloadable maps at:
https://eclipse2017.nasa.gov/eclipse-maps
I've seen people selling these online.
All of these have useful tips on watching the eclipse. One of the best ones I've heard from the pros is, don't take your camera. Enjoy the experience. It's over too quickly to be fooling around with a camera. The web will be full of photos to enjoy. One of my favorites.
https://eclipse2017.nasa.gov/eclipse-maps
We'll be heading out early next week for the Ashville, NC/ Mt Pisgah area. 99.5% totality there. We'll let the weather decide if we head south to Greenville SC or west into Tennessee as far as I need to go.
Safe travels to all that are going and hope it's clear skies all the way across for everyone.