Pacific ENSO Update2nd Quarter, 2006 Vol. 12 No. 2 |
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American Samoa: The 1st Quarter 2006 rainfall total of 61.64 inches at Pago Pago WSO and 87.97 inches at Aafasaou was much wetter than normal (168% and 165% respectively); compared to stations throughout Micronesia, it was matched only by the approximately 65 inches of rain at Kosrae locations during the 1st Quarter of 2006. Three tropical cyclones tracked close to Tonga during January and February, and these combined with a very active phase of the Australian Northwest monsoon caused enhanced northwesterly winds in Samoa with abundant rainfall. In March, the eastern end of the Australian Northwest Monsoon retreated to the Coral Sea, which shifted the focus of tropical cyclone activity and monsoonal rains to that area and away from Samoa.
American Samoa Rainfall Summary 1st Quarter 2006
Climate Outlook: One more tropical cyclone may form within the area from Fiji to Samoa in the next two months. Any such cyclone, however, is anticipated to move to the southeast and spare Samoa from any damaging effects. Thus, the threat of a damaging tropical cyclone in any of the islands of American Samoa is essentially over until the next rainy season (2006-07) when a normal distribution of tropical cyclones in the South Pacific region near American Samoa is anticipated. Normal cyclone activity for an entire rainy season indicates that two or three named tropical cyclones would pass to the south of American Samoa producing episodes of heavy rainfall and gale force northwesterly winds.
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