Resources and Reserves Available to Beat June Heat


Despite hot weather across the PJM footprint this week, no power supply problems are expected at this time. PJM has issued Hot Weather Alerts for the footprint for Monday, June 12, and Tuesday, June 13.

The alerts were called because temperatures are forecast to be above 90 degrees Fahrenheit with high humidity.

The forecasted peak demand for June 11 is about 143,000 megawatts and for Tuesday about 146,000 MW. The forecasted peak demand for this summer is approximately 153,000 MW.

The peak demand for power in 2016 was 152,177 MW, which occurred Aug. 11.

A Hot Weather Alert prepares transmission or generation personnel and facilities for extreme hot and/or humid weather conditions that may cause capacity problems on the grid. Transmission/generation operators determine if any maintenance or testing on their facilities can be deferred to a later date or even canceled.

Hot Weather Alerts do not trigger PJM’s Capacity Performance Assessment Hours for capacity resources, which PJM uses to assess a generator’s performance during selected emergency actions.