Per the following NOAA data through the middle of the week for May 25 2016, the Nino 3.4 index has dropped down to -0.1C. I note that at this critical time in the Arctic that if the Nino 3.4 drops below -0.5C that this could accelerate the advection of warm atmospheric winds from the south into the Arctic Basin, which (if it were to occur) could accelerate Arctic Amplification this summer:
Nino1+2 Nino3 Nino34 Nino4
Week SST SSTA SST SSTA SST SSTA SST SSTA
13APR2016 25.6 0.1 28.6 1.2 29.1 1.3 29.3 0.8
20APR2016 24.7-0.6 28.0 0.6 28.9 1.1 29.4 0.8
27APR2016 24.7-0.3 27.7 0.4 28.7 0.8 29.5 0.9
04MAY2016 25.1 0.4 27.6 0.4 28.6 0.8 29.5 0.8
11MAY2016 24.9 0.5 27.6 0.4 28.4 0.6 29.4 0.6
18MAY2016 24.3 0.2 26.9-0.1 28.1 0.2 29.4 0.6
25MAY2016 24.0 0.2 26.6-0.3 27.7-0.1 29.4 0.6
Separately, the first two images were issued on May 30 2016, by NOAA for the Eq Pac for the SSTA, and the Upper Ocean Heat Anom, Evolutions, respectively. These indicate that we are in a period of transition.
The last two images were issued today by the BoM for the week ending May 29 2016, with the third image showing the Nino 3.4 and the fourth showing the IOD. Again, both plots show that we are in a period of transition.