Every MADIS station I look up on WU has stopped reporting on July 18, 2018.
I guess WU doesn't want MADIS data anymore. Too bad as most MADIS stations actually usually provide better data. Maybe this was one way to cut down on server load and increase website performance.
WU if you are listening it would be a good idea to bring back MADIS stations, and put airport METARs on the map too while you are at it.
Sure lots of MADIS stations also report to WU directly, but some dont.