US Power Grid Near Record Demand Amid Arctic Blast & Cold Weather

Demand on the largest U.S. electric grid, the PJM Interconnection, reached near-record levels on Thursday as frigid temperatures gripped the Midwest and Mid-Atlantic regions. Forecasters are predicting another Arctic blast will arrive over the weekend, potentially straining the system further.

Strain on the Grid

The PJM Interconnection, serving 67 million people across 13 states and Washington, D.C., registered electricity demand at approximately 140 gigawatts during morning hours. The all-time winter record for demand within the PJM territory is 143.7 gigawatts, set in January 2025.

Initial forecasts earlier in the week anticipated that Friday’s demand would surpass the existing record, with predictions reaching 148 gigawatts. However, PJM now projects a demand of around 142 gigawatts for Friday.

Congestion and Outages

The extreme cold has led to congested high-voltage lines across the PJM, New York, and New England grids. Temperatures at or below 0 degrees Fahrenheit (-18 Celsius) have contributed to these overloads as electricity demand surged.

Did You Know? The PJM Interconnection manages the flow of electricity for 67 million people.

Power plant outages within the PJM territory initially exceeded 20 gigawatts earlier this week, attributed to the cold’s impact on gas-fired turbines and coal-fired boiler equipment. PJM now forecasts approximately 15 gigawatts of outages for Friday, representing about 8% of the grid’s total operational capacity of 180.8 gigawatts.

Price Volatility

Wholesale electricity prices on PJM reached $150 per megawatt-hour (MWh) on Thursday afternoon. This represents a significant decrease from earlier peaks this week, when prices briefly exceeded $3,000 per MWh. The price decline coincided with slightly warmer temperatures and improved gas supply availability for power generators.

Expert Insight: The fluctuations in wholesale electricity prices demonstrate the sensitivity of the energy market to extreme weather events and the critical role of fuel supply in maintaining grid stability.

According to Matthew Palmer, head of Americas gas research at S&P Global Energy, another severe cold storm could cause prices to spike again. However, he notes that the likelihood of this decreases as the traditional winter heating season approaches its end in March.

Frequently Asked Questions

What areas are affected by PJM Interconnection?

PJM Interconnection manages the flow of electricity for 13 Midwest and Mid-Atlantic states, as well as Washington, D.C.

What caused the power plant outages?

Power plant outages were caused by the cold disrupting gas-fired turbines and boiler equipment at coal-fired generators.

What was the highest wholesale electricity price recorded?

Wholesale electricity prices briefly soared above $3,000 per MWh earlier in the week.

As winter weather patterns remain unpredictable, how might grid operators balance reliability with cost management in the face of future extreme temperature events?