Was cloud cover the driver of the steep increase in ‘Market Demand’ at lunchtime in NSW on Friday 19th December 2025?

Posted by Paul McArdleFriday 19th December 2025  12:57 PM   Topic: 2025-12-19

We already noted here the lunchtime volatility in NSW:

  • delivering earlier-than-expected volatility
  • due (at least in part) to steep escalation in ‘Market Demand’ since 11:30 NEM time

 

With this snapshot from ez2view featuring two instances of the ‘Forecast Convergence’ widget, we see that unforeseen cloud cover might have been a trigger?

2025-12-19-at-12-50-ez2view-ForecastConvergence

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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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