Suddenly @ around 30 Mph the front end had developed a slight wobble..eek not good !
I jacked it up, no play that I could find in tie rods,, ball joints tight alignment good.. hmmmm....
After removing the front tires I found the culprit, one of the front tires had a slight bulge, the steel belt had slightly shifted !
Took it to my friends shop with 2 new tires to balance on his digital tire machine, and problem solved. All good now, go figure.

Weird.

What make/model/age was the bad tire?

A shifted or broken belt can be potentially dangerous(Think blowout) can you show us the bulge? I think you should relegate your tire to spare duty and replace. If you are near needing tires, replace em all. if you are shortly after new tires, warranty/replace and run with it. At the very least, have it on your rear axle and be careful. I say this as someone who lost their 98 park avenue due to tire blowout and they were good only days before(On inspection) they werent too old andthey were mid life tread wise.

In Michigan pot holes destroy the most tires.

I was in a hurry to get them immediately replaced. They were a mud/snow tire by Arctic Claw Never took photo, They were 6 years old and well worn out ~!

Ah okay, nothing that I need to worry about at 32 degrees North latitude.