Waking early to the sound of approaching thunder definitely qualifies as “ominous”.
On weather radar there’s a big red blotch crossing the Lake, gradually covering Michigan from St Joseph to the Sault Ste Marie. It will be very wet very soon. That’s the bad news.
The better news is that the whole system looks isolated, so if I can wait it out, I could have a mostly dry ride. Judging by the speed it’s moving that could mean a few hours.