Like I have said many times 2016 Election in NC had a lot that hurt the Democratic numbers. With Matthew coming through and the republicans doing dirty tricks. NC will trend democratic hard in 2020
The dirty tricks likely won't stop in 2020. Republicans refuse to give up in their quest to be able to obstruct the election boards, which means they will likely force a bunch of county-level early voting plans that limit voting opportunities for minorities/young people. The law states that if they can't agree on a plan, it defaults to 1 early voting site for the entire county. I don't know what idiot Democrats decided that was acceptable when they passed said law(s), but it is what it is.
But as for the hurricane issue - that probably won't happen again. In which case, the surge of energy on the left we're seeing under Trump could drive up Democratic support in NC a fair bit. Trump is also likely going to pay a penalty in terms of support/turnout for being an unpopular incumbent.