By Scott Dance, Washington Post
When meteorologists began using the five-step Saffir-Simpson scale to measure hurricane intensity in the 1970s, a Category 5 storm represented oblivion. Such a cyclone, with sustained winds of at least 157 mph, could flatten any structure of the era, so there was no reason to give the most ferocious tier of hurricanes an upper bound.
But as the planet warms, storms are increasingly surpassing what was once considered extreme, according to research published Monday. Now, two scientists are proposing a new label they say a growing number of storms already merit: Category 6.
“Climate change has demonstrably made the strongest storms stronger,” said Michael Wehner, a senior scientist at the Lawrence Berkeley National Laboratory. “Introduction of this hypothetical Category 6 would raise awareness of that.”
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