… but then the cooler change arrived in NSW, on Friday afternoon 19th December 2025

Posted by Paul McArdleFriday 19th December 2025  3:08 PM   Topic: 2025-12-19

Based on the 13:45 dispatch interval (NEM time) we wrote ‘NSW ‘Market Demand’ past 12,000MW … how high will it go (on Friday 19th December 2025)?’ … and, at that time, it appeared that the demand would continue to grow.

What a difference an hour makes, because here’s NEMwatch at 14:55:

2025-12-19-at-14-55-NEMwatch

 

The temperature’s dropped markedly in and around Sydney, and the demand growth has abated as well…

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About the Author

Paul McArdle
Paul was one of the founders of Global-Roam in February 2000. He is currently the CEO of the company and the principal author of WattClarity. Writing for WattClarity has become a natural extension of his work in understanding the electricity market, enabling him to lead the team in developing better software for clients. Before co-founding the company, Paul worked as a Mechanical Engineer for the Queensland Electricity Commission in the early 1990s. He also gained international experience in Japan, the United States, Canada, the UK, and Argentina as part of his ES Cornwall Memorial Scholarship.

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  1. Actual lack of reserve level 2 on Friday 19th December 2025 in NSW - WattClarity

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