La Nina is Reappearing/Winter Outlook

La Niña Conditions Taking Shape

 

According to scientists at NOAA's Climate prediction Center, a La Niña weather pattern is developing
as ocean water temperatures continue to cool in the eastern equatorial Pacific. This anomaly often results in unusual weather patterns across much of the United States and the world.

 

 The graphic below shows the typical weather pattern during a La Niña.  Click on the thumbnail for larger view.
 

 

La Niña typically has a less defined impact on our local winter weather than it's cousin, El Niño, which consistently brings mild temperatures and below normal snowfall to the region. Read here for more climate impacts during a La Niña. Here are more specific impacts for the U. S. graphically displayed.

 

Altough local weather patterns during La Niña events are less uniform and not as predictable, the phenomenon appears to have at least some influence on our overall winter weather. On average, climate records indicate that previous La Niña episodes have reslulted in near  normal temperatures and slightly above normal precipitation. However, as you can see from the graph below, there were some wild swings to above and below normal through the records period.

 

The graph below shows that during the last 12 strong La Niña episodes, temperatures during the climatological winter months of December, January and February have trended near normal while precipation was a bit above normal at Duluth.  The trend at International Falls has been for below normal temperatures and above normal precipitaiton.  Click on the thumbnails below for larger views.

 
What's In Store For This Winter?
Winter Temperature Outlook
Click for larger image
Winter Precipiation Outlook
Click for larger image
   



Return to News Archive

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.