The WEM in Western Australia experienced a sharp price spike to $362.20/MWh during the 06:40 interval on 14 June 2026, more than double the preceding interval's price of $177.47/MWh. This single-interval event occurred during the early morning period with mixed fuel sourcing across coal, gas, wind, and battery generation.
The spike was driven by binding constraints on the network, with constraint F_S++SETB_L60 carrying the largest marginal value at $19.99/MWh, indicating material supply-side pressure in that transmission element. Secondary binding constraints (F_MAIN+RREG_0220, F_T+RREG_0050, and F_T+NIL_ML_RECL_L6) with marginal values between $3.00–$3.45/MWh suggest multiple transmission pathways were congested, reducing available capacity and forcing higher-cost generation to clear the dispatch during an interval when demand pressures coincided with constrained network conditions.
Causal analysis generated by gridIQ's synthesis model from live AEMO market data: dispatch prices, generation mix, interconnector flows and market notices in the interval surrounding the event.