| MONTH | EP | NP | PNA | EATL/
WRUS |
SCAND |
| JAN 00 | 0.6 | --- | -1.0 | 0.0 | -1.5 |
| DEC 99 | 0.9 | --- | -1.6 | -1.1 | 1.2 |
| NOV 99 | 0.5 | --- | 0.3 | -0.5 | 0.6 |
| OCT 99 | 0.8 | --- | -0.5 | -1.1 | 0.2 |
| SEP 99 | --- | --- | -0.5 | 0.2 | 0.6 |
| AUG 99 | --- | --- | 0.5 | --- | -0.8 |
| JULY 99 | 0.4 | -2.3 | --- | --- | --- |
| JUNE 99 | 0.8 | 0.1 | --- | --- | --- |
| MAY 99 | 0.6 | -0.2 | -1.0 | 1.6 | -0.6 |
| APR 99 | 1.1 | -0.5 | -0.4 | 0.0 | 0.0 |
| MAR 99 | 0.0 | -1.0 | 0.9 | -1.1 | -0.2 |
| FEB 99 | 2.1 | --- | 0.0 | 0.3 | -1.7 |
| JAN 99 | 1.2 | --- | -0.3 | -0.7 | 0.0 |
Standardized amplitudes of selected Northern Hemisphere teleconnection patterns for the most recent thirteen months. Pattern names and abbreviations are: East Pacific pattern (EP); North Pacific pattern (NP); Pacific/ North American pattern (PNA); East Atlantic/ Western Russia pattern (EATL/ WRUS- called Eurasia-2 pattern by Barnston and Livezey, 1987, Mon. Wea. Rev., 6, 1083-1126); and Scandinavia pattern (SCAND- called Eurasia-1 pattern by Barnston and Livezey 1987). No value is plotted when a pattern does not appear as a leading mode in that month.