Weather API?

by bradsedito 
Anyone know of a good API for realtime weather? I'm making an interactive weather radar from realtime images from the national US  gov site.
♥0 | Line 7 | Modified 2012-06-05 22:30:04 | MIT License
play

ActionScript3 source code

/**
 * Copyright bradsedito ( http://wonderfl.net/user/bradsedito )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/uzLs
 */

package {
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            // write as3 code here..
            
        }
    }
}