Colorado facilities remain closed until further notice.

 View more information.

The El Niño–Southern Oscillation (ENSO) has a major influence on weather in the United States and around the world.

In this briefing, scientists from the UCAR community clarify misperceptions and explain the behavior of this important climate pattern. They also outline the state of the science aimed at predicting the onset and preparing for the impacts of ENSO events.

— January 2015