
A strong atmospheric river moving into northern California later today will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through Wednesday. Gusty winds and isolated showers are expected today in the Northeast U.S. behind a cold front. Wind Advisories have been issued. Read More >
El Niño/La Niña Information
 
A La Niña Watch has been issued which signals conditions are becoming favorable for the development La Niña conditions. Per the Climate Prediction Center, a transition from ENSO-neutral to La Niña is likely in the next couple of months, with a 71% chance of La Niña during October - December 2025.
In North and Central Texas, La Niña patterns tend to favor better chances for warmer than average temperatures and lower than average precipitation (drier).
Weekly Update
The Climate Prediction Center (CPC) creates a weekly ENSO summary (with graphics), available in pdf or ppt formats.
Monthly Update - ENSO Diagnostic Discussion
This monthly summary from CPC is also available in pdf and Word formats.
This collaborative blog discusses the latest about El Niño and La Niña.
All About ENSO
  An Introduction to the El Niño/Southern Oscillation
The above link provides a basic overview of ENSO (El Niño/Southern Oscillation). Various links to other summaries and tutorials are also provided.
  An Explanation of ENSO Indices
Descriptions of various ENSO indices are accompanied by an explanation of how the indices are used to detect/declare an El Niño or La Niña event.
El Niño and La Niña primarily affect the weather during the cold season. What effects does the ENSO phase have on North Texas? Click the Teleconnections link to find out!
Current Data
Various observations, including sea surface temperature animations.
Images of Current Data (from PSL)
Forecasts
Quick Links
  Climate Prediction Center (CPC) - El Niño/La Niña Home
Weekly ENSO Update (available in pdf or ppt)
Monthly ENSO Diagnostic Discussion (available in pdf or Word)
  Physical Sciences Laboratory (PSL) - ENSO Information
  Pacific Marine Environmental Laboratory (PMEL) - El Niño Theme Page
  International Research Institute for Climate and Society (IRI) - ENSO Resources