Squealing (leaning out at the top)
You're describing excessive positive camber (leaning out at the top), no noise would be associated with that. Squealing would be the tire being dragged along the pavement, toe in is always set last because caster and camber affect it. So excessive camber would change the toe setting, enough to make the tires squeal? I dunno, I've never run into that. I'd start by checking upper and lower ball joints and control arm bushings.
Good advice..
Roadrunner CN is describing a second episode of sudden-onset positive camber, plus the tires are squealing.
Both conditions can exist: I suspect the tires will be much more prone the squeal the inside tire of a turn, because IIRC that tire will toe-out more as it lifts..
RoadRunnerCN - I'd like to know in what condition the tires squeal - driving straight, or in turns, or both?