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Do recent storms indicate a climate shift?

The frequency of major storms in the Northwest and New England is up, say experts.

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Most of the news about global climate change this week came from the climate meeting in Bali, Indonesia, and the Nobel Peace Prize award ceremony in Oslo, where former Vice President Al Gore and the Intergovernmental Panel on Climate Change (IPPC) were awarded.

But residents in Centralia, Wash., are more focused on mud and the other damage from recent 100-m.p.h winds and torrential rains there.

What weather forecasters call the Pineapple Express roared through the area, resulting in considerable damage, flooded town centers and interstate highways, and the loss of some lives.

The connection: Experts say there's increasing evidence that global warming is bringing changes in the weather – more major storms, droughts, and wildfires.

After analyzing data from weather stations, the nonprofit group Environment Washington recently reported that storms with heavy rainfall are 30 percent more frequent in Washington State now compared with 60 years ago. Bill LaBorde, program director for the environmental group, says in a story in the Seattle Post-Intelligencer:

"The thing that's interesting about this report is that certainly no single weather event can be tied directly to global warming, but the fact that we're seeing a greater frequency of these events is evidence of global warming in Washington state."

Residents of the southwestern corner of the United States are concerned too.

Researchers with the advocacy group Environment Arizona examined data from more than 3,000 reporting stations between 1948 and 2006. They found that the number of storms with high amounts of precipitation increased by 25 percent in the Mountain West, by 26 percent in Arizona, and by 43 percent in Phoenix, according to a report in the Arizona Republic. The article expounds:

" 'If something is slowly changing, we tend to lose sight of it until it's manifested in some extreme event,' said Kelly Redmond, regional climatologist and deputy director of the Western Regional Climate Center in Reno, [Nev.]. No one notices continental drift until an earthquake occurs, Redmond said. Extreme storms are like the climate equivalent of an earthquake."
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