On Tuesday, March 29, wind turbines in the Lower 48 states produced 2,017 gigawatthours (GWh) of electricity, making wind the second-largest source of electric generation for the day, only behind natural gas, according to our Hourly Electric Grid Monitor. Daily wind-powered electricity had surpassed coal-fired and nuclear electricity generation separately on other days earlier this year but had not surpassed both sources on a single day.