Dear Weatheraardvark and WeatherCat feature junkies,
Ability to have along with what is presently generated, the custom an standard gauges as individual items, such as the jpgs you are already producing
The custom gauges can be uploaded to your website using a web tag like the custom graphs. This is described in the WeatherCat manual starting on page 39. The custom gauges are created as .png files and you'll find them in the directory where WeatherCat places the web page templates for your website with all the tags replaced by either data or links to images that WeatherCat generates.
If you simply want the images for some other purpose, you can create a "dummy" web page with nothing more than the web tags for the custom gauges you need and that will cause WeatherCat to create the images. You could then retrieve those images for whatever purpose you intend.
Cheers, Edouard