 The Weather Channel uses special proprietary equipment that inserts information on current and future local weather conditions, and weather alerts issued by the National Weather Service and the Storm Prediction Center and National Hurricane Center, if it is viewed on a cable television provider.The original WeatherStar technology has been upgraded on larger cable systems to the IntelliStar, which incorporates "Vocal Local" to announce current conditions, weather bulletins and detailed local forecasts.Subscribers of satellite, IPTV and some smaller cable providers originally saw only a roundup of local TWC-sourced forecasts for major cities across the U.S., as well as national and regional satellite and radar images, and severe weather watch and warning maps when active.