Sept. 7 Update: PJM’s Hot Weather Alert Extended Through Sept. 8 for Some Areas


PJM has extended its Hot Weather Alert for its Mid-Atlantic and Southern regions through Sept. 8 ahead of anticipated temperatures above 90 degrees.

PJM has had a Hot Weather Alert in effect throughout all or parts of the PJM footprint since Sept. 4.

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 in parts of the PJM footprint, which drives up electricity usage in those areas.

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 135,000 MW on Sept. 7 and 123,000 MW on Sept. 8.

On Sept. 5 and 6, PJM served preliminary peak loads of approximately 147,000 MW and 142,000 MW, respectively.

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.