CPC issues El Niño Advisory

The NCEP Climate Prediction Center has issued an advisory for El Niño conditions that have been observed and are expected to continue:

El Niño conditions will continue to develop and are expected to last through the Northern Hemisphere Winter 2009-2010. .

During June 2009, conditions across the equatorial Pacific Ocean transitioned from ENSO-neutral to El Niño conditions. Sea surface temperature (SST) anomalies continued to increase, with the latest weekly departures exceeding +1.0°C along a narrow band in the eastern equatorial Pacific.

All of the weekly SST indices increased steadily during June and now range from +0.6°C to +0.9°C . Subsurface oceanic heat content anomalies (average temperatures in the upper 300m of the ocean, also increased as the thermocline continued to deepen
And here is the rest of it.

Read the entire Diagnostic Discussion here at NCEP/CPC.