Weather data provided by Unisys and the National Weather Service (source of the data). Gotohttp://www.smugmug.com/gallery/3843713_gTJu8#492237707_PwGLR to see the weekly timelapse movie made at Concord Academy, Concord, MA. For free software (PC or OSX) to download images of weather data (maps, satellite images, radar) for up to 6 websites continuously, contact John Pickle (picklejohnmr@gmail.com).