I noticed a change too, and I attributed it to the acquisition. Perhaps it was when they put the Weather Channel algorithms in place instead of just the acquisition since it was looking pretty bad for the Weather Channel when their wholly-owned web subchannel was more accurate than the TV version. Lately I have found Accuweather to be better as WU and the Weather Channel are full bore "Climate Change" activists.
That stinks. I really like the hourly graph layout of W.U. I was just bemoaning my own laziness at not having a weather station hooked up to their site. Now I'm glad I didn't do it. I'll have to see if the weather complications on my Apple Watch work with sites other than the Weather Channel. It's funny you should mention them being on board the "Humans Are Ruining A Planet" train. One of the weather stations around me was always reporting temps about 10 degrees higher than everyone else. I often wondered if the guy hadn't put it by his heat pump. I finally reported it to W.U. so they could contact the guy and have him fix it. Not long after, that weather station was no longer visible on their site.
I was a bit skeptical that it was all rigged until i visited Fort Ross Park in California to find they had piled black rocks under their instrument shelter to raise the temperature. That convinced me. It was just announced that we have had the rainiest summer on record (number of days of rain) and the most days of precipitation in any year since 1982. I haven't seen any statements on the temperature, but an ice age could be just around the corner.
The global warming folks often just go back to 1940 for their records (Unprecedented) as the 1930s were considerably warmer than today...but then this has nothing to do with Hurricane Lee, does it?
but if you follow the history of Ice Ages, there is a period of warming that precedes them, then an increase in precip, followed by a drop in temperature as the Earth's albedo increases.