Regarding weather, places that have clouds due to convection have a chance of clearing up during the eclipse. I experienced this in China in 2009 - completely o

Regarding weather, places that have clouds due to convection have a chance of clearing up during the eclipse. I experienced this in China in 2009 - completely overcast two hours before totality, clearing up just in time due to lower solar insolation and less convection. You shouldn't count on this, try positioning for good weather in advance regardless, but just keep it in mind so you don't crash your car heading for better weather if things look poor.