NINO3.4 Sea Surface Temperature (SST) anomalies (a commonly used El Niño-Southern Oscillation Index) are still within weak La Niña range. For the week centered on September 14, 2011, NINO3.4 SST anomalies are approximately -0.68 deg C.
NINO3.4 SST Anomalies – Short-Term
Weekly Global SST anomalies appear to have peaked for the season. For the week centered on September 13, 2011, Global SST anomalies are +0.146 deg C, which is about where they were in the Mid-July 2011 SST Anomaly Update.
Global SST Anomalies – Short-Term
This weekly Reynolds OI.v2 SST dataset begins in 1990. I’ve started the graphs in 2004 to make the variations visible.
OI.v2 SST anomaly data is available through the NOAA NOMADS system: