While many generation sources were negatively impacted, including natural gas around Feb 15 - natural gas drastically increased generation between February 8 and 22, increasing the overall generation as well as making up for shortfalls in other generation sources. The federal EIA has ok charting and a really good API:

  https://www.eia.gov/opendata/embed.php?geoset_id=EBA.NG.WAT.HL&type=chart&relation_mode=line&map=none&regions=&series_id=EBA.TEX-ALL.NG.COL.HL%3BEBA.TEX-ALL.NG.WAT.HL%3BEBA.TEX-ALL.NG.NG.HL%3BEBA.TEX-ALL.NG.NUC.HL%3BEBA.TEX-ALL.NG.OTH.HL%3BEBA.TEX-ALL.NG.SUN.HL%3BEBA.TEX-ALL.NG.WND.HL&date_mode=range&start=202101&end=20210401&periods=

  https://api.eia.gov/series/?api_key=<your API key>&series_id=EBA.TEX-ALL.NG.COL.HL;EBA.TEX-ALL.NG.WAT.HL;EBA.TEX-ALL.NG.NG.HL;EBA.TEX-ALL.NG.NUC.HL;EBA.TEX-ALL.NG.OTH.HL;EBA.TEX-ALL.NG.SUN.HL;EBA.TEX-ALL.NG.WND.HL&start=20210101&end=20210401

  (Get an API key for the second URL from https://www.eia.gov/opendata/commands.php)