The WEM in Western Australia experienced a moderate price spike to $251.28/MWh in the 11:10 trading interval on 6 June 2026, representing a $55.68/MWh jump from the previous interval. Prices had been climbing gradually from $183.71/MWh over the preceding 25 minutes before this sharp spike.
The spike was driven by a binding constraint with an exceptionally high marginal value of $7.308 million (constraint T_BLINK_TV_NGZ), indicating severe scarcity in a critical operational margin. Additional binding constraints with marginal values around $3.74–$3.99 (constraints F_MAIN++LREG_0210 and F_MAIN+LREG_0210) suggest multiple system limitations were active, compounding upward pressure on prices despite a diverse generation mix that included 1,679 MW of wind and substantial gas and coal output.
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.