Last week, the Climate Prediction Center issued an El Niño Watch, with the expectation that conditions in the tropical Pacific would transition into an El Niño pattern by late summer and continue into next winter. And immediately a number of headlines popped up, raising the specter of doom and gloom. The tone reminded me of the fall of 1997 and this cartoon from the Sacramento Bee:
Consequently, I have updated a number of El Niño and La Niña resources that may assist in keeping things in perspective. They are all available from the EL NIÑO / LA NIÑA RESOURCE PAGE
The Oceanic Nino Index is the defacto metric widely used to classify the strength of ENSO (El Niño - Southern Oscillation).events. See https://ggweather.com/enso/oni.htm for current and historic values.
I have also put together a page of misconceptions about ENSO Events. See http://ggweather.com/enso/enso_myths.htm
This is coupled with an ENSO Glossary with some of the more common terminology. See http://ggweather.com/enso/glossary.htm
And to put historical precipitation on the types and strengths of ENSO events, the following analyzed chronologies were updated for both the United States and California. See https://ggweather.com/enso2021/ for the US, then https://www.ggweather.com/ca_enso2021/ca_elnino.html and https://www.ggweather.com/ca_enso2021/ca_lanina.html for California.
Please let me know of any errors or omissions.
Jan Null, CCM
Certified Consulting Meteorologist
Golden Gate Weather Services