WEBVTT FILE 1 00:00:00.130 --> 00:00:04.300 The Global Precipitation (GPM) mission observed Hurricanes Jose and Maria, 2 00:00:04.320 --> 00:00:08.500 providing data to better understand and forecast intense storms. 3 00:00:08.520 --> 00:00:12.680 As Maria developed, the rain pattern became circular and symmetric. 4 00:00:12.700 --> 00:00:16.880 5 00:00:16.900 --> 00:00:21.060 6 00:00:21.080 --> 00:00:25.260 On September 18, Maria began to rapidly intensify. 7 00:00:25.280 --> 00:00:29.440 During intensification, GPM was able to see beneath the clouds, revealing tall storms in the eyewall. 8 00:00:29.460 --> 00:00:33.630 9 00:00:33.650 --> 00:00:37.810 10 00:00:37.830 --> 00:00:42.020 11 00:00:42.040 --> 00:00:46.210 At the time GPM caught Hurricane Jose, the storm structure changed as it interacted with an upper level trough of low pressure. 12 00:00:46.230 --> 00:00:50.380 This caused the air to sink and dry, inhibiting the thunderstorms that fuel the hurricane. 13 00:00:50.400 --> 00:00:54.430 14 00:00:54.450 --> 00:00:50.380 15 00:00:50.400 --> 00:00:57.665