National Weather Service United States Department of Commerce

An Active Weather Wednesday

Strong to severe thunderstorms are possible on Wednesday in parts of the Ohio Valley, Upper Mississippi Valley and south-central Plains. These storms may produce heavy rain and flooding in the Ohio Valley. Meanwhile, a strong cold front will sweep through the Northwest U.S. with rain, mountain snow and high winds. Finally, heat and record high temperatures are likely across the Southern U.S. Read More >

El Niño/La Niña Information


La Niña Advisory

La Niña conditions persist.
As a result, the outlook for May favors warmer than normal temperature and below normal precipitation
during what is climatologically the wettest time of the year.



Temperature Outlook for May



Precipitation Outlook for May



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.

Niño Regions


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


Sea Surface Temperatures

 Current Conditions (from CPC)

Various observations, including sea surface temperature animations.

 Images of Current Data (from PSL)





IRI/CPC Model ENSO Predictions



CPC/IRI Probabilistic ENSO Forecast



 ENSO Forecasts (from PSL)

 ENSO Forecast (from IRI)



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) - ENSO Information

  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