Breaking: PJM Winter Outlook Shows Tighter Margins Amid Record Peak Forecast
The regional grid faces a forecast winter demand of 147,500 megawatts against 182,426 megawatts of capacity, prompting officials to proactively manage system performance.
By Grace Anderson ·
The U.S. Department of Energy declared a power grid emergency across 13 states and the District of Columbia in October, granting PJM Interconnection temporary authority to stabilize the regional grid. Energy Secretary Chris Wright issued the order on Sunday, October 12, 2026, under section 202(c) of the Federal Power Act. The order remained in effect from October 13 through October 16, 2026. This federal intervention allowed PJM to call on generators to run in excess of their operating permits as needed. It also authorized the organization to direct data centers and other large electricity users to switch to their backup generation if necessary.
For the 67 million people served by PJM, the order was designed to prevent interruptions rather than announce scheduled blackouts. No blackouts occurred during the four-day period, and no mandatory conservation orders were issued. Households and businesses experienced normal daily electricity use and required no specific action. The Department of Energy noted that PJM sought to deploy auxiliary, standby, directly connected, battery storage, or other generation resources at data centers, including hyperscaler facilities, and at other large industrial and commercial customer sites.
The grid strain resulted from unusually warm October weather colliding with the fall shoulder season. This period is when generator and transmission owners typically take equipment offline for maintenance and upgrades ahead of winter. Most scheduled outages are prohibited in summer, and the summer peak period ended in mid-September. On Friday, October 9, PJM issued a Capacity Advisory for Monday, October 12, and Tuesday, October 13. This marked the first use of that procedure, which members endorsed in June 2026 for circumstances where projected conditions indicate an approaching capacity shortfall.
A Maximum Generation Alert tells transmission and generation owners that conditions will be tight, allowing them to defer or cancel equipment maintenance and testing. It also informs neighboring grid operators that exports from PJM may be curtailed. On Monday, October 12, PJM issued a Maximum Generation Alert and a Load Management Alert for October 13. It extended the Capacity Advisory through October 14 and issued a Maintenance Outage Recall after forecasting demand of approximately 111,500 megawatts or higher. On October 13, PJM called on Demand Response, which involves paying customers who sign up in advance to cut electricity use when the grid is stressed.
The alerts required no action from customers, but they highlighted the changing nature of electricity demand. PJM states that the shoulder-season reprieve is not what it used to be. Most of the new, rapidly growing demand comes from data centers and other energy-intensive large-load customers. Their consumption does not fall with the weather and represents a 12-month, 24/7 phenomenon. This expanding demand is outpacing new transmission and electricity supply coming onto the system.
Looking ahead, PJM released its Winter Outlook on November 5, 2026. The organization expects sufficient resources to reliably meet demand this winter under expected conditions. However, reserve margins continue to tighten as demand outpaces new supply. PJM expects 182,426 megawatts of operational capacity to serve a forecast winter peak of approximately 147,500 megawatts. This forecast includes about 3,200 megawatts of average exports to neighboring systems. That peak, driven by demand growth, would set a new winter record if reached.
Reliable winter operations depend on strong generator performance during extreme cold, especially where transmission constraints limit deliveries. These constraints are particularly relevant in the BGE, Pepco and Dominion zones in Maryland, Virginia and the District of Columbia. Michael Bryson, PJM's senior vice president of operations, addressed the situation by stating that the goal is to coordinate operations with generation and transmission owners. He emphasized the need to proactively manage the system to perform at high levels when consumers need energy the most.
