⚠️ A #LaNiña 'Costera' event is underway near #Ecuador, with SSTAs approaching their coldest values in 2+ years.

[as cold as -4˚C offshore!]

Over time, the atmosphere will respond to this 'cool pool' with sinking motion in the eastern tropical Pacific. pic.twitter.com/efrlGTUqHM

— Ben Noll (@BenNollWeather) September 17, 2019