Wednesday, October 21, 2009

Pacific El Nino equals Atlantic hurricane calm: experts

Juan Castro Oliveira in PhysOrg, via Agence France-Presse: The Pacific's El Nino ocean-warming phenomenon has resulted in an especially calm Atlantic hurricane season -- a welcome respite for Caribbean and southeastern US residents still smarting from a 2008 pounding. The Pacific's El Nino ocean-warming phenomenon has resulted in an especially calm Atlantic hurricane season -- a welcome respite for Caribbean and southeastern US residents still smarting from a 2008 pounding.

There have only been two hurricanes in the 2009 Atlantic season, which runs from June 1 to late November 30, but normally peaks in September and October… "We were expecting very little activity this season," said Lixion Avila, a weather expert at the Miami-based National Hurricane Center. "This happens when the El Nino phenomenon is present in the Pacific, the water warms up there, and that leads to hurricanes forming there and not in the Atlantic."

…The El Nino effect was powerfully demonstrated on Saturday after warm waters prompted Hurricane Rick to roar to top Category Five status as it barreled up Mexico's Pacific coast. This hurricane season "could end with no impact against the US nor the Caribbean," noted William Gray, a hurricane expert at Colorado State University who has been forecasting hurricanes for 25 years….

Hurricane Bill off the coast of Newfoundland in August, 2009. NOAA

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