I'm getting my forecast data from http://www.weather.gov/xml/#nonSOAP (You can read about that in my site's about (http://forecaster.ws/about.html) page). The current observations are a little more complex- you have to find the closest observation station to that zip code and look it up by the four-digit station code. Then you can look it up like: http://www.weather.gov/data/current_obs/KFTY.xml