Average performance of TAFs, by issuing office September 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 52206 56841 92% 56533 60159 94% 2465 6067 41%
Edmonton 64669 68589 94% 66289 69705 95% 2036 4569 45%
National 116875 125430 93% 122822 129865 95% 4501 10636 42%