June 25 Update: Hot Weather Alert Extended to June 26 for PJM Mid-Atlantic and Southern Regions

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PJM has extended a Hot Weather Alert to Wednesday, June 26, for its Mid-Atlantic and Southern regions with temperatures forecasted to remain in the 90s in those areas. A Hot Weather Alert is currently in effect for the entire PJM region.

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.

As of 8:30 a.m. on June 25, PJM’s forecasted peak for June 25 is over 141,000 MW, and its forecasted peak for June 26 is approximately 138,000 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. 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.

Original Story (June 24): PJM Issues Hot Weather Alert for June 25

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 25 ahead of expected 90-plus-degree temperatures.

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 reliably served electricity customers over an extended heat wave from June 16–23.

PJM served a preliminary peak load of around 148,000 MW on June 21, a preliminary peak load of around 144,100 MW on June 22, and a preliminary peak load of around 132,100 MW on June 23.

As of 10:30 a.m. on June 24, PJM’s forecasted peak for June 24 is approximately 129,000 MW and for June 25 is approximately 141,500 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.