How Strong Can A Hurricane Get?

Image of Category 5 Hurricane Katrina taken by NASA’s Terra satellite at 1:00 p.m. EDT on August 28, 2005, the day before it flooded New Orleans. NASA image courtesy of MODIS Rapid Response Team at Goddard Space Flight Center.

From Live Science:

Hurricane Gustav, churning toward the Gulf Coast now, has a small chance of becoming a Category 5 storm before it makes landfall, according to the National Hurricane Center. That would put its winds at 156 mph or stronger. Such winds would devastate most buildings and trees in the storms path. Little would be left standing.

There is no such thing as a Category 6 storm, in part because once winds reach Category 5 status, it doesn't matter what you call it, it's really, really bad.

Category 5 on the Saffir-Simpson hurricane scale has no upper bound, on paper. But in theory, winds from a powerful hurricane could blow the scale out of the water, scientists say.

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