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Stories

Data-driven stories from the US power grid — events like demand peaks and winter storms, told with an interactive map and the numbers behind them.

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RetrospectiveERCOT

The April 2025 ERCOT Price Spike

No heat, no freeze, no outage declared, and load barely above 45 gigawatts. For about ninety minutes before dawn the ERCOT real-time price spiked nearly seventyfold and collapsed, set not by a crisis but by a thin maintenance calendar, a wind forecast that missed, and a windless hour before the sun came up. Walk the spike interval by interval.