Average performance of TAFs, by issuing office November 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 52417 57488 91% 57880 61713 94% 2962 6659 44%
Edmonton 63590 71550 89% 68062 74509 91% 4435 9574 46%
National 116007 129038 90% 125942 136222 92% 7397 16233 46%