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Hi Michael. Is there a way to know which ENSO's phase was in place in X hurricane season? Personally, I would like to document which phase was present during the landfalls of cyclones that affected Puerto Rico, obviously in recent decades.

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Hi Felipe, yes. Your best source for this is the Oceanic Niño Index (ONI) maintained by NOAA (https://origin.cpc.ncep.noaa.gov/products/analysis_monitoring/ensostuff/ONI_v5.php). Find the ASO (August-September-October) value to determine which phase was present during a particular hurricane season...red (0.5 or greater)=El Niño, blue (-0.5 or lower)=La Niña. Cheers!

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Got one more question. If red (0.5 or greater) = El Niño, and blue (-0.5 or lower) = La Niña, How can I identify Neutral?

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Oh great Michael, thanks! Keep up the good work and thanks for sharing your knowledge.

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