Update: Hot Weather Alert Extended to Wednesday for Mid-Atlantic Region

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August 20 update:

PJM has extended a Hot Weather Alert to Wednesday, Aug. 21, for the Mid-Atlantic region of the PJM footprint. The alert is effect Wednesday from 7 a.m. to 11 p.m. eastern.

The PJM Mid-Atlantic region consists of the service territories of the following transmission owners: Atlantic City Electric, Baltimore Gas and Electric Company, Delmarva Power, Jersey Central Power & Light Co., Metropolitan Edison Co., PECO, Pennsylvania Electric Co., Pepco, PPL Electric Utilities, Public Service Electric and Gas Co., Rockland Electric Company and UGI Utilities.

August 19 Update: Hot Weather Alert Extended to Tuesday for Atlantic Seaboard

PJM has extended a Hot Weather Alert until Tuesday night for the Mid-Atlantic and Dominion service areas, stretching from New Jersey and Pennsylvania to Virginia and North Carolina. The alert is in effect Tuesday from 7 a.m. until 11 p.m. eastern.

The PJM Mid-Atlantic region consists of the service territories of the following transmission owners: Atlantic City Electric, Baltimore Gas and Electric Company, Delmarva Power, Jersey Central Power & Light Co., Metropolitan Edison Co., PECO, Pennsylvania Electric Co., Pepco, PPL Electric Utilities, Public Service Electric and Gas Co., Rockland Electric Company and UGI Utilities.

Dominion serves parts of Virginia and North Carolina.

See Friday’s news story below for previous Hot Weather Alerts covering Sunday and Monday (Aug. 18 &19).

Original Post: Aug. 16, 2019

PJM has issued Hot Weather Alerts for Sunday, Aug. 18, and Monday, Aug. 19, for the entire PJM footprint except for the ComEd region in northern Illinois.

Temperatures are expected to exceed 90 degrees with high humidity in the area, which drives up the demand for electricity.

A Hot Weather Alert helps PJM and its utility partners coordinate the flow of energy to avoid capacity problems on the grid. PJM works with transmission and generation operators to determine whether they can defer or cancel any maintenance or testing on their facilities to accommodate for potential demand needs. Demand is forecast to peak at above 134,000 MW on Sunday and nearly 147,000 MW on Monday.

PJM hit a 2019 peak on July 19 of more than 152,000 MW. The estimated load on Saturday, July 20, was over 150,000 MW, a level that would have set an all-time high for a weekend day when there is less electrical use than a normal weekday.

PJM has 183,454 MW of committed capacity to meet customer demand. One megawatt can power about 800 homes.

PJM’s all-time highest power use was 165,563 MW in the summer of 2006.

How PJM Ensures Reliable Electricity in Hot Weather

PJM meets electricity needs by procuring enough resources to satisfy peak demand, plus required reserves, at the lowest cost through its competitive markets. PJM works with its members to ensure that power flows where it is needed and holds resources, such as generating plants, to strict standards to deliver electricity as promised.

PJM also has resources on reserve to cover generation that is unexpectedly unavailable or demand that is higher than forecasted. Track PJM’s markets and operations in real time on the Markets and Operations page on PJM.com or through the PJM Now app for iPhone and Android. Learn more about how PJM prepares for summer operations on the Learning Center.