Updated: ISO-NE monitoring Tropical Storm Henri

August 23, 2021 – 1:30 p.m.

ISO New England has canceled, effective at 12 p.m. Monday, the precautionary operational alert (M/LCC2) issued Friday ahead of Tropical Storm Henri. Though rainfall is expected to continue across the region Monday, the strong winds that threatened power system operations have abated.

At the peak of the storm, more than 100,000 power outages were reported across New England. The region’s bulk power system operated reliably throughout the event because of strong communication and collaboration between ISO New England and all stakeholders, including the region’s transmission operators, generators, and demand-side resources.

ISO New England will continue coordinating with industry participants in the coming days to maintain a balance of supply and demand as the remaining outages are repaired.

August 22, 2021 – 10:55 a.m.

ISO New England continues to monitor Tropical Storm Henri and its impact on the regional power system.

The precautionary operational alert (M/LCC2) issued Friday afternoon remains in effect for all of New England as the storm approaches, and the ISO’s emergency preparedness plans remain active.

ISO New England will post any updates regarding power system conditions to this article.

August 20, 2021 – 5:11 p.m.

ISO New England is monitoring the path of Hurricane Henri and what impact it will have on the region’s power system.

Beginning at 3 p.m. on Friday, August 20, 2021, we issued a precautionary operational alert, known as M/LCC2, in advance of the storm. The alert is used to notify power system personnel and wholesale electricity market participants when abnormal conditions on the region’s power system exist or are anticipated.

ISO New England has activated its emergency preparedness plans, including increased staffing, and will remain in regular communication with the distribution companies, generators, and other resource owners throughout the storm. System operators will monitor conditions throughout the coming days, and are prepared to take any steps necessary to maintain the reliability of the region’s power system.