 During severe weather events affecting portions of the United States, the Weather Channel may preempt original programming in favor of airing extended coverage under the umbrella title "Weather Center Live" (which move the color of the word "LIVE" from blue to red) to provide long-form coverage and analysis until its aftermath; in some events, the on-air graphics (including Lower Display Line) can go black-and-red (similar to colors that WCL uses); pre-emptions vary between local (isolated to viewers in the region affected by a particular weather event) and nationwide, depending upon the impact of the weather phenomenon/story and if a local provider utilizes a later model WeatherStar unit that allows the use of dual feeds that can substitute programming with long-form weather coverage in a given area.TWC normally utilizes a different music theme for these events, dubbed "Storm Alert Mode", used for both WCL and LOT8's.In a move that caused controversy with many longtime viewers, the Weather Channel began airing weather-related movies on Friday nights on October 30, 2009.