Dear N4KHQ, X-Air, and WeatherCat station caregivers,
I went ahead and moved this topic into Weather Hardware so that we could continue the discussion without disturbing Stu monitoring of the Bugs topic.
I will let you know in a week or so but my guess is WC was hanging in starting mode because the Pro 2 was loosing power at night.
It does appear that you allowed your station to go too far without some TLC. WeatherCat has a nice feature to remind you to check your station hardware. It is on the Misc2 pane of the WeatherCat preferences. It is described starting on page 165 of the WeatherCat 3 manual.
Do let us know how your transmitter replacement works out. I ran into a similar problem a few years back, but my problem was definitely more complicated and ultimately required changing the location of my transmitter as well. In your case, it should be a straightforward swap of new for old.
Cheers, Edouard