Just as it projected a day earlier, ERCOT set a new winter peak of 65.73 GW Wednesday morning. The demand was almost 3 GW higher than the previous record of 62.86 GW on Jan. 3. (See SPP Resets Winter Peak Record, ERCOT Set to Follow.)

The ISO said historic low temperatures in Texas resulted in multiple new peaks before demand settled on the new record between 6 and 7 a.m. Single-digit temperatures extended from North Texas to the Gulf Coast overnight, stranding trucks on icy highways.

ERCOT said it has sufficient generation resources to meet forecasted demand, but it also issued a news release Wednesday offering conservation tips to consumers.

SPP also set yet another winter peak when it recorded demand of 43.58 GW at 7:23 a.m. Wednesday. That surpassed the Jan. 16 record of 42.71 GW.

MISO tweeted late Wednesday night that MISO South had also set a new winter peak but did not say the exact figure.

— Tom Kleckner