MONTH EP NP PNA EATL/

WRUS

SCAND
SEP 99 --- --- --- --- ---
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
DEC 98 0.7 --- -0.3 -1.1 -0.4
NOV 98 1.1 --- -0.3 0.3 1.1
OCT 98 1.1 --- -1.0 -0.3 -0.1
SEP 98 -- -- 0.3 0.0 0.2

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.