Average performance of TAFs, by issuing office December 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 50635 57452 88% 58688 64238 91% 4489 11323 40%
Edmonton 66829 74604 90% 70798 77355 92% 4320 9950 43%
National 117464 132056 89% 129486 141593 91% 8809 21273 41%