Ontario Wind Forecasting Weak During Cold Spell

Ontario's cold spell this week inspired me to check on how the Ontario's wind forecasting was performing.
It isn't good.
The Independent Electricity System Operator (IESO) runs a central forecasting system.
Ratepayers, not generators, fund it.  I tested the performance by tracking the hours of forecasting, and actuals, for hour 19 over the past 4 days


Data, and chart, are contained in google spreadsheet here