MISO’s maximum generation emergency event during a harsh winter featured under-forecast demand, issues with pricing software and day-ahead models so bogged down by complexity that they took longer to solve.

MISO said lackluster generating unit performance led to an emergency declaration during the late January winter storm.

MISO declared a maximum generation emergency for its Midwest region just after midnight on Jan. 24 as the northern portions of the footprint rode out double-digit negative temperatures.

MISO said 2025 was the most demanding summer since 2012, though it steered the grid with only a single maximum generation event.

The MISO Independent Market Monitor called on the RTO to develop a penalty system for generation for underperformance during emergencies.

MISO Midwest entered emergency status during the RTO’s first serious heat wave of the summer.

PJM credited emergency procedures with improving generator performance during a pair of winter storms in January, including a new all-time winter peak of 145,060 MW.

MISO and the Tennessee Valley Authority hope to implement an emergency energy purchase framework by Christmas Eve.

MISO and the Tennessee Valley Authority are poised to strike an agreement on emergency energy transactions after months of RTO leadership complaining that TVA doesn’t return the favor of energy transfers in times of need.

MISO expounded on why its late August maximum generation emergency wasn’t met with prices dictated by its emergency offer floors.