If you'd like to start your explorations of Web Weather with a very graphic -and very powerful- Web page, begin with one of these...
It's on Cable TV 24 hours a day, but it's on the Web, too; The Weather Channel has some fascinating background material as well as up-to-the-minute forecasts for most cities, maps, and radar information. Almost every map shown on TV is available from their Web Site as well. And don't miss its Canadian counterpart, The Weather Network with some innovative presentations of both Canadian and US weather.
TV Weather Dot Com is a fascinating site with links to TV Weather pages, weather equipment and more. As more and more TV stations add live weather radars on their web sites, this place can be a real gold mine!
Both CNN and USA Today have brought their weather information to the web as well. Unfortunately, these sites are not updated all that frequently during the day.
Accuweather currently offers a free, customized page of information about your location including live NEXRAD images (no delay!).
Developed by Tribune Media Services, a leader in innovative internet content, WeatherPoint provides comprehensive weather information in a variety of formats.
Saving one of the best for last, WSI's Intellicast USA Weather has crisp satellite photos and radar imagery with extensive local information for many cities (in fact, it supplies most of the NEXRAD images used at many of the sites listed here). Virtually all its data is updated at least hourly, sometimes more often.