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Pacific ENSO Update

3rd Quarter, 2010 Vol. 16 No. 3


Continuing a nearly five-year trend of below normal tropical cyclone activity, the western North Pacific basin was very quiet during the first half of 2010. Only two cyclones were noted in the basin for the six-month period from January through June. The first cyclone of the year (occurring in January) was a tropical depression in the South China Sea. The second cyclone formed south of Guam in mid-April, and became Tropical Storm Omais as it passed near Ulithi on the 23rd of April. At the time of this writing (15 July) the first typhoon of the year, Typhoon Conson, had completed a crossing of Luzon. The timing of the year's first typhoon (which was also the third numbered tropical cyclone in the basin) put the 2010 season into the lowest 10% category for statistics of delay and reduction of TC numbers.

The PEAC Center archives western North Pacific tropical cyclone numbers, track coordinates, and 1-minute average maximum sustained wind taken from operational warnings issued by the Joint Typhoon Warning Center (JTWC) of the U. S. Air Force and Navy, located at Pearl Harbor, Hawai'i. Western North Pacific tropical cyclone names are obtained from warnings issued by the Japan Meteorological Agency (JMA), which is the World Meteorological Organization's Regional Specialized Meteorological Center (RSMC) for the western North Pacific basin. The PEAC archives South Pacific tropical cyclone names, track coordinates, central pressure, and 10-minute average maximum sustained wind estimates from advisories issued by the Tropical Cyclone Warning Centers at Brisbane, Nadi, and Wellington. The numbering scheme and the 1-minute average maximum sustained wind estimates are taken from warnings issued by the JTWC. There are sometimes differences in the statistics (e.g., storm maximum intensity) for a given tropical cyclone among the agencies that are noted in this summary.

Pacific ENSO Applications Climate (PEAC) Center
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Page Last Modified: August 12 2010 00:49:54 GMT


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