Commodity Demand — TAS1: Sunday 31 May 2026

Tasmania enters Monday 1 June at $87.20/MWh with demand sitting at 1,172 MW — the highest level recorded in the dataset and consistent with the steep evening ramp that has been building since around 06:00 AEST. The demand trajectory over the past several hours tells a clear story: Tasmania troughed at roughly 870–880 MW through the mid-afternoon low-demand window (16:00–16:30 AEST), then climbed steadily through the early evening as heating loads intensified under 5.9°C ambient conditions with a heating demand index of 12.1. That 300 MW swing from afternoon trough to current peak has tracked price from the $80.02/MWh floor — where it sat persistently through the mid-afternoon — up to the current $87.20/MWh level, confirming a tight but predictable price-demand relationship in the $80–$87 band.

Price sensitivity across the history dataset is notably contained. The spot price oscillates primarily between two discrete levels — approximately $80.02/MWh and $87.04–$87.20/MWh — reflecting Tasmania's characteristic dispatch stack where hydro and wind capacity brackets demand across most operating conditions. Isolated spikes above this range did occur: $109.10/MWh at 07:55 AEST (Sunday evening), $161.48/MWh at 19:55 AEST, and $106.57/MWh at 16:00 AEST, each brief single-interval events that resolved immediately, suggesting transient dispatch constraints or interconnector flow adjustments rather than sustained supply tightness. Wind is currently contributing 152.72 MW alongside 1,059.26 MW of hydro, and gas OCGT sits at zero — generation is comfortably covering demand at this point.

Forward forecasts for today converge tightly on $87.18–$87.20/MWh through the 07:00–08:00 AEST period, with load window data indicating prices step down into the $70.64–$78.34/MWh range from approximately 12:30–14:00 AEST as the overnight trough arrives. The lowest forecast prices appear in the 15:30–16:30 AEST window (UTC 05:30–06:30), where multiple forecast runs consistently print $70.64–$72.95/MWh — the deepest trough of the day. Today being a public holiday Monday will suppress commercial and industrial demand relative to a standard weekday, reinforcing the case for a more pronounced daytime low than a typical June Monday. The morning peak risk window is the 17:00–19:30 AEST period, where demand can be expected to rebuild toward 1,100–1,200 MW on current temperature forecasts (max 12.4°C today), likely holding prices in the $87/MWh range but with limited upside risk given hydro's dispatchable buffer.

One relevant market notice is active: AEMO directed Origin Energy's Quarantine PS Unit 5 in SA and cancelled that direction at 23:15 AEST last night, signalling a brief SA system security event that resolved without Tasmania-specific intervention. No TAS1-specific network or reserve notices are in force. The Basslink interconnector position is not explicitly reported in the data, but the absence of any inter-regional transfer notices affecting T-V-MNSP1 today suggests normal flow conditions. Demand managers with flexible loads should note the