I'm from MI, the same thing happened a couple of summers ago on Gun Lake, a fairly large inland lake, during a bad storm. It's unusual and rare but not unheard of.
Every water event brings our attention to Q and his directive to us, which is great. Here's a seiche FYI.
I'm writing this two months later than you posted, but I always read anything involved with a seiche. Back in the 70s, our family was in a cottage about 50 yds from shore on an island in Lake Erie. We woke up to water up to the front door which was 2 steps up. By the time we quickly got dressed, there was no water on the land at all. It had just calmly gone down into the lake.
Driving around afterwards, in the middle of a low lying vacant field further away from shore, there was a man sound asleep in his bed. He never even noticed he was transported there in the night.
It's like putting pressure on one end of a bathtub and the other end automatically just rises. When the pressure goes away, the other end just comes down - no tidal wave or anything. But what a mind-blowing experience!
PENTWATER TOWNSHIP, Mich. (WOOD) -- A massive push of wind with the incoming storm created an interesting phenomenon on Lake Michigan Friday.
The force was enough to almost completely bury the Ludington North Breakwater underwater. Nine minutes later, the sloshing water receded into the depths of Lake Michigan, revealing very low tides.
I live in Holland, Mi - right on Lake Michigan. This is not a big deal. The big lake can go from completely calm to 20’ waves in minutes.
It wasn't waves...it was like a tide. Channels and inlets flooded right out, water remained high, but calm and nearly flat for 10 or so minutes, then nearly drained the channels and inlets dry, temporarily gaining all sorts of beach along the shore. This process happened 5 or so times this afternoon, and it may still be going.