I was part of that acquisition. To be fair, Weather Channel was already running Weather Underground into the ground when they acquired it first. IBM just came in and helped them finished the job.
A huge part of it was the incompetence with which IBM pushed us to use Watson modules in our products, which I could see 6 years ago were worse than open source AI options and had no application to Weather Underground's services. They were basically toy projects being advertised as ground-breaking AI. I'm not surprised at all to see Watson finally collapsing under the weight of its vacuous claims.