Here's some more data and scenarios for folks to consider. Some of the potential impacts outside of the North are a bit unexpected and if you're near Lincoln there are some wildly different possibilities. I'll add on other sources as I find them and time allows.
Demographic Projections
High School Task Force Scenarios
Inside the notes for the meetings are a large variety of maps. Here are the latest ones. As you can see there are large differences in what might happen.