Average performance of TAFs, by issuing office May 2011
  VFR Category Above IFR Alternate Category Below IFR Alternate Category
EC Weather Centre Location Correct Forecasts (hours) Total Forecasts (hours) VFR Reliability Index Correct Forecasts (hours) Total Forecasts (hours) Alternate Reliability Index False Alarms (hours) Total Forecasts (hours) Below Alternate False Alarm Ratio
Montreal 48574 54847 89% 55758 60809 92% 3431 9871 35%
Edmonton 64647 69473 93% 67618 71540 95% 2155 5021 43%
National 113221 124320 91% 123376 132349 93% 5586 14893 38%