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Hurricane Irma Blasts Into The Record Books With Lasting Intensity

http://www.npr.org/sections/thetwo-way/2017/09/12/550188154/hurricane-irma-blasts-into-the-record-books-with-lasting-intensity

 

There's a really nice animation by NPR.

"Hurricane Irma was the longest-lasting powerful hurricane or typhoon ever recorded, worldwide.".

"Irma sustained its 185-mph winds for 37 hours".

 

How Powerful Can A Hurricane Get?

http://www.iflscience.com/environment/how-powerful-can-a-hurricane-get/

 

"The scale is relatively simple:

Tropical Depression = less than 63 km/h (less than 39 mph)

Tropical Storm = 63-118 km/h (39-73 mph)

Category One Hurricane = 119-153 km/h (74-95 mph)

Category Two Hurricane = 154-177 km/h (96-110 mph)

Category Three Hurricane = 178-208 km/h (111-129 mph)

Category Four Hurricane = 209-250 km/h (130-156 mph)

Category Five Hurricane = greater than 252 km/h (>156 mph)"

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