Important: The Climate Analysis Branch (PSD1) web site will be down in anticipiation of our major web restructuring starting Tuesday Jan 20th at 1pm MST.
You can find more info about the upcoming URL changes here.
 

View NCEP Data Source

1998-99 La Niña Animation

SST Animation

Restart Animation

Anomaly   =   (Current Observation   -   Corresponding Climatological Value)
Base period for the climatology is 1950-1979