This is another weather plasmoid. It aims to be highly customizable, but a
little harder to setup than other weather plasmoids. Nearly any weather
forecast provider can be used, as long as the data is provided as html files
(no flash). The information how to extract the information from these html
files is stored inside xml files. Commands like grep, head, tail, sed, awk, ...
will do this job.

Some xml files are already included, you can find them under
/usr/share/kde4/apps/plasma-cwp