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From September 28 through October 10 the Global Precipitation Measurement (GPM) mission

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observed Hurricane Matthew, providing insights into the

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storm's structure and behavior as it battered the Caribbean and southeastern U.S. coast.

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The GPM Constellation of satellites provided rainfall estimates every 30 minutes as the 

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hurricane progressed. Headed for the Caribbean, Matthew rapidly intensified from a 

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Category 1 to a Category 5 in 24 hours.

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The purple and pink shades indicate where Matthew's slow motion resulted in a deluge

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of rainfall. 

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Before Matthew made landfall in Haiti, it weakened to a Category 4 storm.

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The winds in Matthew's environment caused heavier rains

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on the storm's northeastern side as it approached Haiti.

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As Matthew headed northward, GPM saw an eyewall replacement cycle.

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Here a compact, more intense eyewall

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is replaced by a broader eyewall.

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The eyewall change slowed the peak winds, but exposed more of the U.S. coast to the larger

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eyewall's winds. As Matthew hugged the U.S. coast,

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the storm's eye remained over the ocean.

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This allowed Matthew to maintain its source of energy while damaging Florida, Georgia and

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the Carolinas. Rainfall estimates in North Carolina were more than 20 inches.

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Hurricane Matthew, combined with previous storms, caused widespread flooding

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across the state.

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