The first attached image shows the NOAA plots of SSTA for the 4 Nino regions. I believe this data is valid through about May 20th, but I'm not 100% sure. NOAA hasn't issued their weekly ENSO status report, presumably due to the holiday. Per this data, it appears SSTA increased in all regions except the Nino 4. The Nino 3.4 region appears to be about +1.1 deg C, which would be warmest weekly value from NOAA for this event so far. The CDAS Nino 3.4 index from tropicaltidbits.com shows that SSTA in the Nino 3.4 region have decreased during the past few days but may be on the rise again.
The Second attached image shows the BOM Nino 1, 2, 3, 3.4, and 4 indices respectively, for data through May 24th. Per this data, the Nino regions were as follows:
Nino 1: +1.97 deg C
Nino 2: +2.19 deg C
Nino 3 : +1.27 deg C
Nino 3.4: +1.09 deg C
Nino 4: +1.05 deg C