Things are split up into Perl scripts, data engines, and plasmoids. Its still version 0.0.1 so expect a reading of the README and a bit of tinkering to get going.
One of the nice things is that the radar image loop can be offered on the desktop with just the latest doppler radar overlay. As the background, topographic and locations are all separate PNGs you can easily get a custom look and feel or theme for your version too.
Observations are downloaded for your nominated cities. The observations plasmoid can show the ambient and apparent temperature, wind average and gust speeds, and rainfall on a rolling graph. These screenshots were taken with a sample time of 1 second and a random multiplier to test, in reality you should see nicer bell like curves for temps and less sporadic curves for wind. Seeing the gust as a cumulative on the same graph is handy for motorbike riders so you can see how "choppy" things are at a glance. Especially if you have observations for other places that you are heading towards which might be 100-200km away from your abode. For temps as shown below the -1 as the offset to apparent temp from ambient temp. The time is always when the latest observation was taken.
As you see below, the blue area is the gust speed above the average. So a variable wind will show up graphically. The direction is shown in the title along with the average and gust relative to avg speeds. I particularly hate the weather applets that show the direction as an arrow, and wind speed as a smaller number. Chewing up screen for something I don't care about and not showing detailed wind observations.
As this was my first foray into KDE applets, I found the many tutorials on DataEngine and Applets to be a good start, but there are still times when you have to RTFS and grep the subversion to work out how to do things. I still have another plasmoid to write but a release will happen very soon. I infact tried kde-apps.org today but its interface is annoying so I'll likely shove it up on sf.net in the next few days.
