I've updated the Ensemble Oceanic Nino Index (ENS ONI) for the first time since July, which now includes data through October.

The latest monthly ENS ONI value is +1.5°C (w/ an uncertainty of ~ +/- 0.15°C). This is the 8th highest ENS ONI value on record for October since 1850,… pic.twitter.com/EWwaEF1T30

— Eric Webb (@webberweather) November 10, 2023