The NWS has XML feeds available to display current conditions for a given area (or a set of given areas). Weather.com offers a feed as well but you have to sign up for the service and sometimes the updates are iffy. I have been playing with both and while the NWS feed is nice the document is somewhat sloppy. I want to try their web service and will probably end up doing so when I have a chance.
The Weather.com feed is nice but I have noticed that sometimes it fails to update or gives incomplete information. I am going to keep playing with it and see if I can get it to perform a little better. I am going to be implementing one of the options here soon, I just need to decide which one I like better.
Speaking of weather, the temperature has dropped into the 20’s and we are getting pretty heavy flurries… Strangest weather, ever.