Canada Free Press has an informative article on wind capacity. It concludes:

The term “Generating Capacity” as used by the wind power proponents is grossly misleading as it would require steady, uninterrupted storm to hurricane force winds to be achieved on a sustained basis.

The variability of wind creates technical problems which make wind power generated electricity both unreliable and costly.

Electricity generation from wind requires full backup by conventional power generating facilities. That creates additional costs attributable to wind power.

Wind power generated electricity is neither free, nor economical, nor a reliable energy source.