pre-1998 STAR units on March 11, 2010, coinciding with The Weather Channel permanently adding a version of the LDL for the network's national clean feed.) With the release of the Weather Star XL, the LDL was modified to include short-term daypart (and, later three-day) forecasts for the STAR's home location as well as a semi-translucent background; the later release of the IntelliStar saw the incorporation of additional products into the LDL, including air quality indexes, travel forecasts for three major cities in the region, traffic information and almanac data. The IntelliStar units' LDL was redesigned on November 12, 2013, expanding it to be displayed throughout all programming on the national feed (including commercial breaks and telecasts of its long-form programs, but not during local ad breaks inserted at the provider level); the LDL was replaced by a rundown/progress bar during the full-screen LOT8s segments, indicating the time remaining for the product currently playing and up to two forecast products scheduled to be played afterwards. A sidebar, which was shown only during the channel's forecast programming and was removed during commercial breaks, was also added and paired with the LDL on the right third of the screen over the channel's high definition simulcast feed and displayed supplementary observation data (including visibility, dew point and barometric pressure data that was previously shown on the LDL), average flight delay times for area airports, air quality forecasts, and historical almanac data. All STAR systems are able to display watches, warnings and advisories issued by the National Weather Service and the Storm Prediction Center for the immediate area where the WeatherStar system's headend is based, which generate a tone as an audible leader to the alert message. Older STAR units up to the WeatherStar 4000 displayed NWS bulletins in the form of a full-screen vertical scroll with differing colored backgrounds (brown for advisories and red for warnings), which was paired with the Lower Display Line. However, the 4000 introduced a horizontal ticker that was restricted to the bottom third of the TWC video feed; since November 12, 2013, IntelliStar models now display alerts over the national feed's headlines ticker placed above the LDL. The systems are also capable of generating multiple scrolling text advertisements that appear at the bottom of the screen during local forecast segments, which are programmed into the administrative menus by a local provider-employed technician. STAR units are also capable of generating