| Average performance of TAFs, by issuing office March 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 | 50219 | 55171 | 91% | 55081 | 59440 | 93% | 3032 | 7788 | 39% |
| Edmonton | 64129 | 69810 | 92% | 68245 | 73073 | 93% | 3386 | 7432 | 46% |
| National | 114348 | 124981 | 91% | 123326 | 132512 | 93% | 6418 | 15220 | 42% |