National Weather Service United States Department of Commerce

La Niña conditions have developed in the tropical Pacific and are expected to persist through the winter. As a result, a La Niña Advisory has been issued.


La Nina Advisory terms

La Nina Advisory criteria



Below is a map of the typical effect La Niña has on the November-March temperatures in the United States. The yellow and orange colors indicate areas where temperatures often average warmer than normal during a La Niña winter:

La Nina temperature anomalies



Here is a map showing the typical effect La Niña has on November-March precipitation. The blue and green colors in the Ohio Valley indicate a tendency toward wetter than normal conditions:

La Nina precipitation anomalies


It is important to remember:

  • The influence of La Niña on the Ohio Valley is not very strong
  • Every La Niña is different, and not all La Niña winters behave the same way
  • The strength of the La Niña may make a difference in how it affects our weather both in terms of precipitation and temperature  
  • There are myriad factors that work together to result in the weather we experience -- La Niña is just one of them

For more information click on the links below:

La Nina precipitation patterns





La Niña precipitation patterns

La Nina temperature patterns





La Niña temperature patterns

ENSO local page




Local ENSO (El Niño/La Niña) page

ENSO information sheet




Two-page information sheet