We knew it would happen sooner rather than later. For the week centered on May 7, 2014, the sea surface temperature anomalies of the NINO3.4 region have joined the others above the +0.5 deg C threshold of an El Niño. See the four graphs in Figure 1. NINO1+2 values have taken another leap higher.
The Reynolds OI.v2 data are available through the NOAA NOMADS website.