I am at work and cant open the logs, but out of curiosity, what did your voltage look like? My car did some odd things like this when the voltage regulator in the alternator was failing.

Nothing that the car hasn't experienced before. Snow is normal, and no rain recently.
The car is receiving > 14V from the alternator and there has been no indication of any electrical interruption from inside the car.

I thought about the MPI relay, but I don't think it would return to normal when putting the car under additional load. I kind of ruled that one out.
I haven't completely ruled out the ECU yet, but at the same time, I don't have any reason to suspect it.