Tue, 17 Apr 2007 10:34:04 EDT http://www.noaawatch.gov/ NOAA Information on El Nino / La Nina noaawatch@noaa.gov http://validator.w3.org/feed/docs/rss2.html en-us noaawatch@noaa.gov http://www.noaawatch.gov/images/rss/enso.gif http://www.noaawatch.gov NOAA Logo http://www.noaanews.noaa.gov/stories2009/20090709_elnino.html NOAA scientists today announced the arrival of El Nino, a climate phenomenon with a significant influence on global weather, ocean conditions and marine fisheries. El Nino, the periodic warming of central and eastern tropical Pacific waters, occurs on average every two to five years and typically lasts about 12 months NOAA expects this El Nino to continue developing during the next several months, with further strengthening possible. The event is expected to last through winter 2009-10. Thu, 09 Jul 2009 09:59:20 EDT ronald.c.jones@noaa.gov http://www.cpc.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.html During December 2008, negative equatorial sea surface temperature (SST) anomalies strengthened across the central and east-central Pacific Ocean. Convection remained suppressed near the International Date Line and became more persistent near Indonesia during December. Low-level easterly winds and upper-level westerly winds also strengthened across the equatorial Pacific Ocean. Collectively, these conditions reflect the development of La Niņa. For the contiguous United States, potential impacts include above-average precipitation in the Ohio and Tennessee Valleys and below-average precipitation across the South, particularly in the southwestern and southeastern states. Other potential impacts include below-average temperatures in the Pacific Northwest and above-average temperatures across much of the southern United States. Sat, 10 Jan 2009 08:29:40 EST ronald.c.jones@noaa.gov http://www.elnino.noaa.gov/ La Niņa is characterized by unusually cold ocean temperatures in the Equatorial Pacific, compared to El Niņo, which is characterized by unusually warm ocean temperatures in the Equatorial Pacific. Wed, 02 Jul 2008 09:32:37 EDT noaawatch@noaa.gov http://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.html Atmospheric and oceanic conditions during February 2008 continued to reflect a strong La Niņa. The most recent dynamical and statistical sea surface temperature (SST) forecasts for the Niņo 3.4 region continue to indicate a moderate to strong La Niņa through March 2008, and a weaker La Niņa through April-May-June 2008. Current atmospheric and oceanic conditions and recent observed trends support the likely continuation of La Niņa through the Northern Hemisphere spring 2008. Thu, 06 Mar 2008 11:24:51 EST ronald.c.jones@noaa.gov