June 21 Update: Hot Weather Alert Extended to June 24 for PJM Mid-Atlantic and Southern Regions

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PJM has extended a Hot Weather Alert to Monday, June 24, for its Mid-Atlantic and Southern regions as 90-plus-degree weather continues to persist in those areas.

A Hot Weather Alert is currently in effect for the entire PJM region through Sunday, June 23, which includes all or parts of 13 states and the District of Columbia.

A Hot Weather Alert is a routine procedure PJM issues ahead of forecasted 90-degree weather and/or high humidity in order to prepare transmission and generation personnel and facilities for expected increases in electricity demand. Temperatures are expected to be in the 90s throughout the PJM footprint, which increases demand for electricity.

The Mid-Atlantic Region is made up of the Atlantic City Electric, Baltimore Gas and Electric, Delmarva Power & Light, Jersey Central Power & Light, Met-Ed, Penelec, PECO Energy, Pepco, PPL Electric Utilities, PSE&G, and Orange & Rockland (Rockland Electric Company) transmission zones. The Southern Region is made up of the Dominion transmission zone.

PJM served a preliminary peak load of 143,130 MW on Wednesday, June 19, and a preliminary peak load of 142,662 MW on Thursday, June 20. PJM’s highest preliminary peak load so far this week was 144,009 MW, occurring on Tuesday, June 18.

As of 7 a.m. on June 21, PJM’s forecasted peak for June 21 is over 149,000 MW.

PJM currently expects to serve the following peak loads from June 22–24:

  • Saturday, June 22: 145,345 MW
  • Sunday, June 23: 137,317
  • Monday, June 24: 138,579

June 19 Update: PJM Extends Hot Weather Alert Through June 23

PJM has extended a Hot Weather Alert through June 23 for its entire service area, which includes 13 states and the District of Columbia, amid continued 90-plus-degree weather.

This alert is currently in effect and was originally scheduled to expire June 21.

A Hot Weather Alert is a routine procedure PJM issues ahead of forecasted 90-degree weather and/or high humidity in order to prepare transmission and generation personnel and facilities for expected increases in electricity demand. Temperatures are expected to reach the 90s throughout the PJM footprint, which increases demand for electricity.

PJM served a preliminary peak load of around 140,100 MW on Monday, June 17, and a preliminary peak load of around 144,000 MW on Tuesday, June 18.

As of 9 a.m. on June 19, PJM’s forecasted peak for June 19 is over 141,500 MW.

PJM currently expects to serve the following peak loads from June 20–23:

  • Thursday, June 20: 145,018 MW
  • Friday, June 21: 150,951 MW
  • Saturday, June 22: 142,392 MW
  • Sunday, June 23: 138,978 MW

Original Story (June 14): PJM Issues Hot Weather Alerts for June 16–21

PJM has issued a Hot Weather Alert for its entire service area, which includes all or parts of 13 states and the District of Columbia, for June 17–21 ahead of an expected prolonged period of 90-plus-degree weather. PJM has also issued an additional Hot Weather Alert for its Western region for June 16.

A Hot Weather Alert is a routine procedure PJM issues ahead of forecasted 90-degree weather and/or high humidity in order to prepare transmission and generation personnel and facilities for expected increases in electricity demand. Temperatures are expected to reach the 90s throughout the PJM footprint, which increases demand for electricity.

A Hot Weather Alert is currently in effect for PJM’s Mid-Atlantic and Southern regions.

As of 7 a.m. on June 14, PJM’s forecasted peak for June 14 is approximately 127,000 MW.

PJM currently expects to serve the following approximate peak loads from June 15–19:

  • Saturday, June 15: 108,000 MW
  • Sunday, June 16: 116,000 MW
  • Monday, June 17: 142,000 MW
  • Tuesday, June 18: 147,000 MW
  • Wednesday, June 19: 148,000 MW

Overall, PJM projects higher peak demand for electricity this summer at approximately 151,000 MW compared with the 2023 summer peak load of 147,000 MW. PJM’s all-time, one-day highest power use was recorded in the summer of 2006 at 165,563 MW. One megawatt can power about 800 homes.

Read more about PJM’s preparations to serve consumers reliably and meet electricity demand during the stretch of hot weather.

June 16 Hot Weather Alert for PJM Western Region

The June 16 Hot Weather Alert for the PJM Western region impacts the following transmission zones and control areas:

  • AES Ohio (formerly Dayton Power & Light)
  • American Electric Power (AEP Ohio, Appalachian Power, Indiana Michigan Power and Kentucky Power)
  • American Municipal Power Transmission
  • ComEd
  • Cleveland Public Power
  • Dayton Power & Light
  • Duke Energy Ohio and Duke Energy Kentucky
  • Duquesne Light Company
  • East Kentucky Power Cooperative
  • FirstEnergy South – former Allegheny Power Systems (West Penn Power, Mon Power, Potomac Edison)
  • FirstEnergy West – former American Transmission Systems, Inc. (Penn Power, Ohio Edison, The Illuminating Company and Toledo Edison)

Ohio Valley Electric Corporation