Dear Rich, X-Air, and WeatherCat troubleshooters,
Thanks for the help...now where does one type that app specific password?
Some other apps warn and then tell you where to type it in???
Here is a screenshot of the WeatherCat email preferences pane with the password field marked with an arrow:
Simply paste the application specific password obtained from the Apple website and you should be good to go so long as you have all the other parameters set for iCloud email.
Cheers, Edouard