Climate Prediction Center

www.nws.noaa.gov

Climate Diagnostics Bulletin

Tropical Highlights

Table of Atmospheric Indices (Table 1)

Table of Oceanic Indices (Table 2)

Time Series

Time-Longitude Sections

Mean & Anomaly Fields

Appendix 1: Outside Contributions

Table of Atmospheric Indices

APRIL 2016

	SLP ANOMALIES		TAHITI	850-hPa ZONAL WIND INDEX			200-hPa WIND INDEX	OLR Index
MONTH			minus	5N-5S	5N-5S	5N-5S	5N-5S	5N-5S
	TAHITI	DARWIN	DARWIN SOI	135E-180	175W-140W	135W-120W	165W-110W	160E-160W
APR 16	-1.3	0.9	-1.2	0.2	-0.2	-0.3	-1.1	-0.9
MAR 16	0.7	0.9	-0.1	0.1	-0.2	-0.3	-0.5	-1.6
FEB 16	-1.9	1.8	-2.0	0.1	-0.5	-0.2	-1.0	-2.4
JAN 16	-0.4	3.5	-2.2	-0.4	-2.2	-1.5	-1.8	-1.9
DEC 15	-1.4	-0.4	-0.6	-0.1	-1.1	-1.5	-1.5	-2.5
NOV 15	-0.3	0.6	-0.5	0.0	-1.2	-1.3	-1.8	-1.3
OCT 15	-0.1	3.0	-1.7	-1.1	-2.3	-2.0	-1.7	-1.4
SEP 15	-1.3	1.7	-1.6	-1.3	-1.0	-1.0	-0.8	-1.5
AUG 15	-1.2	1.4	-1.4	-1.1	-1.3	-0.8	-0.5	-1.4
JUL 15	-0.5	1.6	-1.1	-1.5	-2.2	-2.1	-1.0	-0.3
JUN 15	-0.7	0.4	-0.6	-0.6	-0.6	-0.3	-0.4	-1.4
MAY 15	0.3	1.6	-0.7	-1.2	-1.2	-1.2	-1.5	-1.0
APR 15	0.6	0.6	0.0	-0.6	-0.6	-0.5	-1.0	-1.1

TABLE 1. Atmospheric index values for the most recent 12 months. Indices are standardized by the mean annual standard deviation, except for the Tahiti and Darwin SLP anomalies which are in units of hPa. Positive (negative) values of 200-hPa zonal wind index imply westerly (easterly) anomalies. Positive (negative) values of 850-hPa zonal wind indices imply easterly (westerly) anomalies. Anomalies are departures from the 1981-2010 base period means.


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