Here is the overall generation mix from February 11–17. The upper light brown line is gas-fired generation. The brown line starting at about 10,000 is coal. Green is wind, the yellow is solar, as is apparent from the daily pattern, and the almost-straight line starting at about 5,000 is nuclear.
Source is EIA…they have a lot of useful data, but you have to poke around a bit to find it.