Solo a Tier 4?
Certainly, I'm not there yet. I'm still working my way through the 3s. But the weather boost has made those much more attainable for a low level player like me. So the question is:
Has anybody successfully soloed a Tier 4 raid utilizing Weather boost?
All internet searches result in pre-weather boost queries.
Answers
I don't think so. Absol would be the most likely candidate, and the best result from simulations I could find is a weather-boosted level 40 Machamp with 15A, 15S, and defense between 0-5, which takes ~208 seconds to beat an Absol with snarl/megahorn, using the no-dodging strategy. The Machamp dies seven times before defeating the Absol.
However, it is certainly possible that Niantic could introduce new T4 bosses that might be soloable. I'm not sure if they would want to, though. Maybe as a special event boss or something.