The surface wind data in this beautiful wind map from Hint.fm comes from the National Digital Forecast Database. It's basically an art project, not guaranteed to be scientifically perfect, but it's dramatic stuff today during Hurricane Sandy:
These are near-term forecasts, revised once per hour. So what you're seeing is a living portrait. (See the NDFD site for precise details; our timestamp shows time of download.) And for those of you chasing top wind speed, note that maximum speed may occur over lakes or just offshore.
If you're looking for a weather map, or just want more detail on the weather today, see these more traditional maps of temperature and wind.
There's a beautiful animated version, too.