You generally can't have line breaks in a macro. Some templates have been written with a description or notes section that can handle line breaks, but the default template can't. Once you are past the name, every time you want a new line or grouping in the output, you would need to put it in another double set of curly brackets. So, everything you have above needs to be in one continuous line. You might think about putting more groupings of brackets, like the light, medium, and heavy precipitation.