Summit Voice: A trend of more frequent nighttime heatwaves in the Pacific Northwest may not portend killer temperatures and withering crops, but it is another sign that global warming will have a profound effect on regional climate and weather.
Scientists with the Oregon Climate Service at Oregon State University documented 15 examples of nighttime heat waves from 1901 through 2009. Ten of them have occurred since 1990 and five were during a four-year period from 2006-09.
The research shows that the region...