WEBVTT FILE 1 00:00:00.030 --> 00:00:04.050 From September 28 through October 10 the Global Precipitation Measurement (GPM) mission 2 00:00:04.070 --> 00:00:08.130 observed Hurricane Matthew, providing insights into the 3 00:00:08.150 --> 00:00:12.170 storm's structure and behavior as it battered the Caribbean and southeastern U.S. coast. 4 00:00:12.190 --> 00:00:16.250 The GPM Constellation of satellites provided rainfall estimates every 30 minutes as the 5 00:00:16.270 --> 00:00:20.290 hurricane progressed. Headed for the Caribbean, Matthew rapidly intensified from a 6 00:00:20.310 --> 00:00:24.320 Category 1 to a Category 5 in 24 hours. 7 00:00:24.340 --> 00:00:28.370 The purple and pink shades indicate where Matthew's slow motion resulted in a deluge 8 00:00:28.390 --> 00:00:32.450 of rainfall. 9 00:00:32.470 --> 00:00:36.560 Before Matthew made landfall in Haiti, it weakened to a Category 4 storm. 10 00:00:36.580 --> 00:00:40.590 The winds in Matthew's environment caused heavier rains 11 00:00:40.610 --> 00:00:44.630 on the storm's northeastern side as it approached Haiti. 12 00:00:44.650 --> 00:00:48.700 As Matthew headed northward, GPM saw an eyewall replacement cycle. 13 00:00:48.720 --> 00:00:52.820 Here a compact, more intense eyewall 14 00:00:52.840 --> 00:00:56.900 is replaced by a broader eyewall. 15 00:00:56.920 --> 00:01:00.920 The eyewall change slowed the peak winds, but exposed more of the U.S. coast to the larger 16 00:01:00.940 --> 00:01:04.990 eyewall's winds. As Matthew hugged the U.S. coast, 17 00:01:05.010 --> 00:01:09.120 the storm's eye remained over the ocean. 18 00:01:09.140 --> 00:01:13.280 This allowed Matthew to maintain its source of energy while damaging Florida, Georgia and 19 00:01:13.300 --> 00:01:17.300 the Carolinas. Rainfall estimates in North Carolina were more than 20 inches. 20 00:01:17.320 --> 00:01:21.380 Hurricane Matthew, combined with previous storms, caused widespread flooding 21 00:01:21.400 --> 00:01:25.410 across the state. 22 00:01:25.430 --> 00:01:28.147