Sept. 14 Update: Hot Weather Alert Extended to Sept. 15 for PJM’s Mid-Atlantic Region

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PJM’s Mid-Atlantic region will remain in a Hot Weather Alert through Sept. 15 as temperatures approach 90 degrees in that area amid the transition from summer to fall.

PJM’s Mid-Atlantic and Southern regions are currently in a Hot Weather Alert for Sept. 14.

A Hot Weather Alert helps to prepare transmission and generation personnel and facilities for extreme heat and/or humidity that may cause capacity problems on the grid. PJM works with transmission and generation operators to determine if they can defer or cancel any maintenance or testing on their facilities.

The Mid-Atlantic region includes 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.

Original Story: Hot Weather Alert Issued for Sept. 14 for Mid-Atlantic and Southern Regions

PJM has issued a Hot Weather Alert for its Mid-Atlantic and Southern regions for Tuesday, Sept. 14, with humid and hot weather forecast for those areas amid the transition from summer to fall.

Temperatures are forecast to approach the 90s with high humidity, which drives up the demand for electricity.

A Hot Weather Alert helps to prepare transmission and generation personnel and facilities for extreme heat and/or humidity that may cause capacity problems on the grid. PJM works with transmission and generation operators to determine if they can defer or cancel any maintenance or testing on their facilities.

The Mid-Atlantic region includes 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.

Preparing for Summer Demand

PJM power system operators have forecast a peak demand for electricity this summer at approximately 149,000 MW but have performed reliability studies at even higher loads – in excess of 155,000 MW – for the region. PJM has over 185,000 MW of installed generating capacity available to meet customer needs, with sufficient resources available in reserve to cover generation that is unexpectedly unavailable, or for other unanticipated changes in demand.

PJM’s all-time highest power use was 165,563 MW in the summer of 2006. One megawatt can power about 800 homes.

Track Operations in Real Time

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.