Many ways to measure #ElNino. SST 3.4 index is 4th strongest April to June. True test comes this Winter @nbcbayarea pic.twitter.com/vTpXduY9dU
— Jeff Ranieri (@JeffRanieri) August 1, 2015
The Niño3.4 SST ( Sea Surface Temperatures) anomaly index is an indicator of central tropical Pacific El Niño conditions. It is calculated with SSTs in the box 170°W - 120°W, 5°S - 5°N.Anomalously warm conditions are associated with El Niño events, which peak in boreal fall/winter.
-RW
This graph matches the stock bubbles (not the dates but the graph).
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