I saw a very bright flash across the window shade. It looked like a nearby flash of lightning would.
I checked the radar and the sky is clear.
I freaked out a bit. Then, I heard the boom.
I went online and thankfully found that I wasn't going crazy.
Really, really strange.
Fond du Lac residents in 5 counties in Wisconsin reported large meteor blast with green light in the area around 1:30 a.m., police checking.— IndependentRidersUS (@MotoRidingGroup) February 6, 2017
UPDATE, from WISN:
A meteor passing over Lake Michigan early Monday morning lit up the sky in several states and shook houses with its sonic boom.UPDATE, from CBS 58:
...Meteorologist Jeff Last of the National Weather Service's office in Green Bay said the meteor was accompanied by a sonic boom that shook houses in the region.
Last said radar shows the meteor passing over Lake Michigan, but he said it wasn't clear if it landed in the water or if it broke up in the sky.
An apparent meteor streaked across the Midwestern sky early Monday morning. The American Meteor Society has received more than 170 reports of a fireball crossing the Wisconsin sky around1:25 AM. The green fireball was seen in Wisconsin and Illinois, but the AMS has received other reports of seeing the fireball from Michigan, Indiana, Ohio, Iowa, New York, Kentucky, Minnesota and Ontario, Canada.When it's around 1:30 in the morning and you see a massive flash that's seemingly inexplicable, and then you hear a very loud boom, also inexplicable, it's scary.
The AMS estimates the trajectory of the meteor as traveling from the southwest to the northeast, ending its flight over Lake Michigan somewhere between Manitowoc and Sheboygan.
I'm glad it turned out to be a phenomenon of nature.