NINO3.4
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
GLOBAL
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
NOTE
This weekly Reynolds OI.v2 SST dataset begins in 1990. I’ve started the graphs in 2004 to make the variations visible.
SOURCE
OI.v2 SST anomaly data is available through the NOAA NOMADS system:
Bob Tisdale - Climate Observations 
Bob,
Is this overview of the Pacific, by Noaa, Laboratory for Satellite Altimetry. http://ibis.grdl.noaa.gov/SAT/SeaLevelRise/index.php (right side) a useful, general overview of Nino/Nina progression?. It seems that east/west sea levels are a reasonable indicator but I would like your opinion.
Hi Bob, what do you think about the above? Cold La Nina subsurface pool evolves, but the usual build-up of warm pool more to the west is like diminishing. Is it a case, when La Nina does not recharge the OHC, maybe connected with cold PDO phase?
Juraj V. : If you recall earlier in the year, the Western Equatorial Pacific had been recharging. Not sure what happened to it, but that slice is not too thick.