Sept. 6 Update: PJM’s Hot Weather Alert Extended to Sept. 7 for Some Regions


PJM has extended its Hot Weather Alert for its Mid-Atlantic and Southern regions through Sept. 7 ahead of anticipated temperatures above 90 degrees.

PJM previously issued a Hot Weather Alert for the entire RTO footprint for Sept. 4–6.

A Hot Weather Alert is a routine procedure PJM issues in anticipation of 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 exceed 90 degrees throughout the PJM footprint, which drives up electricity usage.

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 PJM Southern Region consists of Dominion Virginia Power’s service territory.

PJM is expecting to serve a forecasted load of approximately 144,500 MW on Sept. 6 and 134,500 MW on Sept. 7.

On Sept. 5, PJM served a preliminary peak load of approximately 147,000 MW. PJM’s current peak demand for this summer occurred July 27 and was approximately 148,000 MW. The all-time recorded peak electricity demand on the PJM system was 165,563 MW on Aug. 2, 2006.