Resurgent SOI

(Updated below)

Latest 30-day moving average of the SOI is -9.7.

The last time the SOI was that low was the 30-day period ending November 15.

Update:
The -9.7 SOI value is in the top 40% of all negative values since the index went negative last May. It/s also in the top third since the +ENSO began, base on NOAA/s definition (>= 0.5°C), in late September.