On July 19, 2014, ABC News announced that Marciano would become the network's senior meteorologist. He has since joined Good Morning America Weekend and reports on the latest weather headlines throughout the week as well as partners with Ginger Zee and the Extreme Weather Team for weather coverage across all ABC News broadcasts and platforms. His final co-hosting of Entertainment Tonight came on Wednesday, August 27, 2014. He debuted on GMA on Saturday, September 6, 2014.