@Mark Oomkes speaking from experience…
Now there's an 84% chance of rain tonight and 34% tomorrow. I see nothing on the radar in the Midwest, other than something rolling through the eastern UP.Hmmm...dry week they say.
Then all of a sudden "20% chance of showers tonight and tomorrow".
Then it went to 50% tonight.
Now it's 70% and heavy rain.
Good thing, getting kinda dry.