Thunder around 6:45 this morning?

I've seen posts here about loud aircraft sounds so when I woke up early today I wondered what I was hearing. Went immediately to the window didn't see any big trucks (snowplows can sound like that-I know there's no snow), decided it was thunder.

It's unusual but not unheard of for winter. Especially when there's a changing weather system like we're seeing now. Can't believe the extremes when I look at the weather map. (I went to the weather apps but they said nothing about thunder).

Just wondered whether others had heard it?