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The Global Precipitation (GPM) mission observed Hurricanes Jose and Maria,

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providing data to better understand and forecast intense storms.

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As Maria developed, the rain pattern became circular and symmetric.

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On September 18, Maria began to rapidly intensify.

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During intensification, GPM was able to see beneath the clouds, revealing tall storms in the eyewall.

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At the time GPM caught Hurricane Jose, the storm structure changed as it interacted with an upper level trough of low pressure.

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This caused the air to sink and dry, inhibiting the thunderstorms that fuel the hurricane.

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