Average performance of TAFs, by issuing office July 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 54960 59295 93% 58467 62213 94% 2478 6478 38%
Edmonton 70064 73567 95% 72071 74936 96% 1555 3850 40%
National 125024 132863 94% 130538 137149 95% 4033 10328 39%