Lunchtime volatility in NSW on Friday 19th December 2025

Posted by Paul McArdleFriday 19th December 2025  12:48 PM   Topic: 2025-12-19

A quick snapshot from NEMwatch at 12:30 (NEM time) on Friday 19th December 2025, to mark an earlier-than-forecast arrival of prices above $1,000/MWh:

2025-12-19-at-12-30-NEMwatch

Note the steep escalation in ‘Market Demand’ in NSW since the 11:30 dispatch interval.

 

Also worth noting that  the interconnectors are mostly behaving themselves at this dispatch interval and not flowing counter-priced:

  • with the exception of flow running from Victoria into SA over both VIC1-SA1 and Murraylink
  • and Directlink, of course.
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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.

1 Comment on "Lunchtime volatility in NSW on Friday 19th December 2025"

  1. Ian McGregor | Monday, December 22 2025 at 4:20 pm | Reply

    A quick look on the Zoom Earth cloud cover shows increasing cloud cover over Woolloongong, Sydney and Newcastle from 11:40am on into the afternoon. Could that be the cause? I would say a good chance.

1 Trackbacks & Pingbacks

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

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