A wind power forecast overestimated the amount of wind power to be generated Friday morning by 800 megawatts, Samaroden said.

When the Keephills 2 natural gas plant west of Edmonton tripped offline two hours later, AESO asked power distribution companies, including Edmonton's Epcor and Calgary's Enmax, to begin rotating outages to their customers, she said.

So the wind turbines still work, there is just not enough of them, but the petro-chemical powered plant, which Alberta continues to tell us is the only real way to supply a grid, failed.