The NOAA prediction for the 2020 hurricane season is for the season to be more active than normal. Arthur was the first named tropical storm of the 2020 season. According to the following analysis by meteorologist Mark Torregrossa at MLive Weather, residual moisture from Arthur was responsible for boosting the rainfall total in a portion of northern lower Michigan from "four inches tops" to eight inches.
https://www.mlive.com/weather/2020/0...ng-formed.html
So, though various governmental policies will deservedly be scrutinized, there really was an unusual rain event tied to the beginning of a probable active hurricane season. It isn't definitive that climate change is responsible for the flooding but it will be considered.
The warm weather we are having for this Memorial Day might also be left over from Arthur.
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