heavy_wx

Watertown is about 3 hours from Scranton. But maybe it's a bit early to plan lol.

The best bet might be the cumulus shadows near the Ontario and Erie lake shores. Of course in April, there could also be widespread overcast throughout the Great Lakes.

Same, I've never been to Kentucky or Tennessee. I'm thinking I'll probably leave my hotel in KY around 4-5 am just to be safe with regards to traffic. I have plenty of work to keep me busy while I wait anyway...

Some supersaturation wrt ice around 200 mb but otherwise southeastern TN is looking pretty good as of now.

I think it's probably best to be at your intended viewing location at least a couple hours before the eclipse. I would definitely avoid big metro areas like St. Louis or Nashville if possible. Major interstates near the path of totality will probably be OK a few hours before the eclipse. Interstates that connect directly to large cities like I-55 and I-70 in Illinois, I-65 in IN/KY, and I-75 in KY may be pretty busy early in the day if people are driving south for the day. I'm considering going to Sparta, TN because it isn't near any north-south interstates and it's also not really that close to I-40, so traffic shouldn't be bad a few hours before the eclipse.

It's only like an extra second longer in southern IL vs. central MO so I'm not sure that will really cause people to seek out that area especially; weather and convenience are probably the dominant factors in where people end up going. Getting to the center of the totality path is also important if you want a longer eclipse. I booked a hotel in Richmond, KY for Sunday night with plans to drive into central TN or western KY depending on the weather.