Commodity Demand — TAS1: Sunday 21 June 2026

Tasmania sits at $79.28/MWh with demand at 1,362.92 MW as of 06:30 AEST, climbing sharply through the Monday morning peak period. The demand trajectory over the past 90 minutes tells the story directly: from 1,271 MW at 06:00 AEST, load has risen nearly 100 MW in half an hour as households respond to a 3.4°C ambient temperature and a heating demand index of 14.6. That rate of climb — roughly 60–70 MW per 30-minute interval — mirrors the pattern from the prior peak window, where demand pushed to 1,436 MW around 18:00–18:30 AEST before the market printed a single interval spike to $20,300/MWh at 18:00 AEST and sustained elevated prints above $350/MWh across adjacent intervals. The price-demand relationship in TAS1 is non-linear and highly sensitive at this demand level: below ~1,300 MW the region holds comfortably at the $70.24/MWh floor band, but above 1,350 MW dispatch tightens and prices begin stepping through $78–$80/MWh, with tail risk to three-digit territory when hydro scheduling or Basslink flows constrain marginal capacity.

The forward forecast is materially more aggressive than current spot. AEMO's pre-dispatch run (issued 06:01 AEST) has prices escalating to $105.61/MWh by 07:00 AEST, $191.61/MWh by 07:30 AEST, and $408.81–$511.87/MWh across the 08:00–08:30 AEST window — precisely when demand is expected to approach or exceed the morning peak. The 08:30–09:30 AEST window carries forecast prices of $444–$558/MWh, consistent with constrained marginal supply at demand levels likely to exceed 1,400 MW given the 10.9°C maximum temperature forecast and the persistent cold morning. Relief arrives in pre-dispatch only after 12:30–13:00 AEST (UTC+10), when prices are projected to fall back to $70.24/MWh as demand eases off the morning plateau.

A standing Forecast LOR1 notice for Tasmania on 25 June (08:00–09:00 AEST, 50 MW reserve shortfall) provides context for the broader reserve tightness in the region this week, though today's pre-dispatch does not reflect a formal LOR declaration. Multiple AEMO intervals from the prior peak — 06:30 AEST and 06:35 AEST — are currently subject to manifestly incorrect inputs review, meaning some historical price points in the $79–$350 range may be revised; traders should treat those intervals with caution for settlement reference purposes. The generation mix — hydro at 1,368.98 MW, wind at 19.03 MW, gas OCGT at zero — shows dispatch is currently meeting demand in full from dispatchable sources with minimal headroom above present load, which directly explains the market's sensitivity to further demand increases in the next two to three hours.