Current Status  |  Impacts  |  What is El Niño?  |  Historical  |  Climatology  |  Diversity  |  FAQ

El Niño, a warming of the Pacific Ocean around the equator, can have effects on patterns of weather variability throughout the world. These pages provide background information on El Niño, including monitoring the current El Niño, comparisons to past strong El Niños, and possible impacts in the Midwest.

Go to Current Status and Monitoring
Go to Impacts Section
Go to GIS ENSO Tool
Go to What is El Niño?
Go to Historical El Niños
Go to Climatology of El Niño