William J. Karins (born April 14, 1974) is an American meteorologist, working for NBC News. He is currently seen primarily on NBC's Early Today and Top Story with Tom Llamas. He also occasionally reports weekdays for MSNBC's First Look, Way Too Early, Morning Joe, MSNBC Live and CNBC. Prior to being named an NBC meteorologist, Karins was one of the original meteorologists for the now shuttered NBC Weather Plus. From 2009 to 2012, Karins had been the meteorologist on Weekend Today on Saturdays. Karins was briefly one of several substitute hosts for Way Too Early during the departure of Willie Geist from the show for his Today hosting duties.He has also appeared as a fill-in for Al Roker on Today, and for Dylan Dreyer on Weekend Today.