Average performance of TAFs, by issuing office August 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 54135 59260 91% 58956 63114 93% 3137 7818 40%
Edmonton 67487 71398 95% 69114 72602 95% 2087 5303 39%
National 121622 130659 93% 128070 135716 94% 5223 13121 40%