I prepared the LiveGauges plugin for WeatherCat, using the realtimeMT.txt.
Please let me know if it works, my testing possibilities for WeatherCat are very limited. This is more or less experimental and if there are any problems I will try to update it and solve them.
Also note that in order for this to work you need to make sure you are using the latest version of the weatherCat plugin (v.2.1).
Try changing the index.php in the URL of the above demo to index2, index3… index9. Those are the possible options and you can simply rename whichever one you choose to index and that will be the one used. Read the documentation for this plugin and how to install it.