Season's 1st tropical storm forms in eastern Pacific

Hurricanes Are Lingering Longer. That Makes Them More Dangerous.

The result is more rainfall and more damage to buildings as hurricanes hover over population centers for longer periods of time.

This isn't about how powerful a storm's winds are, just how fast it chugs along. Local tropical cyclone rainfall totals would be expected to increase by the same percentage due to the slowing alone.

Previous research has shown that a warmer climate can hold more water moisture, so when it rains, it rains more.

"Nothing good comes out of a slowing storm", says James Kossin, with the National Oceanic and Atmospheric Administration's Center for Weather and Climate in Madison, Wisconsin, and author of the first paper, published today in the journal Nature.

The unusually slow-moving Hurricane Harvey was a recent example.




Although commending the study for its findings, she said it is not without its limitations. A slow storm increases the risk of damaging floods. So it isn't clear just how much of the change that Kossin found is actually attributable to human-induced climate change. "At least not yet".

That means that storms farther from land in the earlier part of the study may not have had their speeds included in the study. That's bad news for places like Houston, Texas, which is still rebuilding after catastrophic flooding.

'These trends are nearly certainly increasing local rainfall totals and freshwater flooding, which is associated with very high mortality risk'.

Scientists expect climate change is going to make tropical cyclones - including hurricanes - more severe. "And, unfortunately, this signal would point to more freshwater flooding". Follow him on Facebook, Twitter and Instagram.

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