Table 3: Six, nine and twelve month correlation coefficients for an 96 case sub-sample from each prediction system. The sub-sample is for forecasts initialized each month of each year 1982, 1983, 1984, 1986, 1987, 1988, 1989 and 1991. The 99% confidence interval is shown in bold.
| Forecast System | 6 Month CC | 9 Month CC | 12 Month CC |
| Consensus | 0.874 ± 0.09 | 0.815 ± 0.13 | 0.725 ± 0.17 |
| LDEO1 | 0.656 ± 0.20 | 0.610 ± 0.21 | 0.473 ± 0.26 |
| LDEO2 | 0.792 ± 0.14 | 0.701 ± 0.18 | 0.661 ± 0.20 |
| UOX | 0.744 ± 0.16 | 0.597 ± 0.22 | 0.451 ± 0.26 |
| SIO | 0.695 ± 0.18 | 0.664 ± 0.20 | 0.638 ± 0.20 |
| COLA | 0.696 ± 0.18 | 0.660 ± 0.20 | 0.551 ± 0.24 |
| NCEP | 0.787 ± 0.14 | 0.688 ± 0.19 | 0.475 ± 0.26 |
| LIM | 0.711 ± 0.17 | 0.596 ± 0.22 | 0.464 ± 0.26 |