National Oceanic and Atmospheric Administration's (NOAA) National Weather Service. Official US weather, marine, fire and aviation forecasts, warnings, meteorological products, climate forecasts and information about meteorology.

National and Local Weather Forecast, Radar, Map, and Report. The Weather Channel and weather.com provide a national and local weather forecast for cities worldwide, as well as weather radar, map, and report.

Weather forecasts for the US and the world with a fast, easy to use interface. Includes weather maps, graphics, astronomy information, and radar images.

Yahoo weather including forecasts, resources and categories.