| Average performance of TAFs, by issuing office January 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 | 47856 | 55232 | 87% | 55351 | 60980 | 91% | 4062 | 9707 | 42% |
| Edmonton | 61220 | 70850 | 86% | 66762 | 74711 | 89% | 5483 | 12200 | 45% |
| National | 109076 | 126082 | 87% | 122114 | 135691 | 90% | 9545 | 21907 | 44% |