US electricity prices varied widely across major markets on Monday, with PJM posting $347.73 per megawatt-hour and the Midcontinent Independent System Operator the lowest at $68.38/MWh, according to GridStatus.io.
The Electric Reliability Council of Texas' real-time locational marginal price stood at $24.16/MWh at 4 p.m. ET. Net load was 39.6 gigawatts, while natural gas made up the largest portion of the generation mix at 31.1%.
The California Independent System Operator's real-time LMP came in at $16.27/MWh at 4 p.m. ET. Net load was negative 0.14 GW, with solar making up the biggest share of the generation mix at 69.2%.
Southwest Power Pool's real-time LMP was negative $2.50/MWh at 4 p.m. ET. Net load stood at 30.62 GW, while wind supplied the largest share of the generation mix at 37.5%.
SPP recorded an intraday low of negative $36.27/MWh at 5:45 a.m. ET before prices peaked at $107.49/MWh at 4:45 p.m. ET.
PJM Interconnection posted a real-time LMP of $31.28/MWh at 4 p.m. ET. Net load was 90.44 GW, with gas making up the largest share of the generation mix at 40.4%. Prices reached an intraday high of $347.73/MWh at 1:25 a.m. ET.
MISO's real-time LMP came in at -$64.31/MWh at 4 p.m. ET. Net load stood at 65.31 GW, while natural gas led the generation mix at 29.4%. Prices also fell to an intraday low of negative $68.38/MWh at 2:25 p.m. ET.
New York Independent System Operator's real-time LMP was $31.97/MWh at 4 p.m. ET. Net load reached 16.77 GW, with dual fuel accounting for the largest share of the generation mix at 27.5%. Prices rose to an intraday high of $93.17/MWh at 7:45 a.m. ET.
ISO New England recorded a real-time LMP of $30.04/MWh at 4 p.m. ET. Net load stood at 9.57 GW, while natural gas supplied the biggest portion of the generation mix at 33.1%.
Independent Electricity System Operator's real-time LMP was $35.50/MWh at 4 p.m. ET. Net load was 16.01 GW at 3:55 p.m. ET, with nuclear providing the largest share of the generation mix at 45.2%.
The National Weather Service's Climate Prediction Center forecasts above-normal temperatures across much of the central, southern, and eastern US from Sept. 22-28, with near-normal conditions in parts of the West and Northeast.