Have purchased WeatherCat2, which looks exactly like LWC2, which was a great find!
HOWEVER, I am still getting, "Weather Station not found" still with OS Sierra. I have carried out the suggestions in the WeathaerCat2 manual of powering down the Davis Pro 2 console, checked the cable (mini-USB to USB, same as when it worked with OS Snow Leopard for years), and unplugged the USB to the iMac.
Here's the background: everything was fine with Snow Leopard on a 2010 iMac when I took that computer to have its contents copied to a brand new iMac. The company was unable to return the ancient OS, Snow Leopard to the 2010 computer, instead it came back from the shop with El Capitan, and the Davis weather station has "not been found" since, either on the 2010 iMac with El Capitan (using LWC2), or on a brand new iMac with Sierra now using WeatherCat2 I purchased yesterday.
The only thing that has changed in this scenario is the iMac OS. The console was sending data to that old iMac right up until I took it in.
This problem has gone on for months, and I truly believed that WeatherCat2 was the fix! I feel its something obvious that I just cannot think of. I've tried all the other USB ports on this new iMac with no change in the situation.
Thanks for any help for this OS and weather station-challenged weather nut,
art