A strongly positive 𝗜𝗻𝗱𝗶𝗮𝗻 𝗢𝗰𝗲𝗮𝗻 𝗗𝗶𝗽𝗼𝗹𝗲 (𝗜𝗢𝗗) is currently a major global climate driver.

For those preparing analog guidance for the upcoming winter, you might want to consider years that had a +IOD.

Here's what it means... https://t.co/nQvPp33pMc

— Ben Noll (@BenNollWeather) October 5, 2019