NOAA_Enso_fig5 Published September 12, 2009 at 722 × 653 in El Niño is expected to strengthen and last through the Northern Hemisphere winter 2009-2010 ← Previous Figure 5. Forecasts of sea surface temperature (SST) anomalies for the Niño 3.4 region (5°N-5°S, 120°W- 170°W). Figure courtesy of the International Research Institute (IRI) for Climate and Society. Figure updated 18 August 2009.