First, a big
Welcome AboaRd,
Bob! Your research is great; this is
the place to get help!
Secondly, if you use WeatherCat, you don't have to do any extra work/coding to send data to WU or several other places. It's built right into the app. You just need to enter your registration info for the sites you want to use (WU, CWOP, MetOffice, WeatherBug, Weather Cloud and PWS Weather). WU and CWOP have their own tab in the WeatherCat prefs->On-Line page. I'm assuming you already have an account at WU. You can even send a shirt (what else) message to Twitter through the app.