WEBVTT FILE 1 00:00:00.120 --> 00:00:04.350 On April 1, 2017, a Nor'easter hit New England, covering the region with snow. 2 00:00:04.370 --> 00:00:08.400 On April 1, 2017, a Nor'easter hit New England, covering the region with snow. 3 00:00:08.420 --> 00:00:12.450 A Nor'easter forms when warm, moist air traveling north with the Gulf Stream 4 00:00:12.470 --> 00:00:16.580 collides with cold air moving down from Canada, resulting in snow and rain. 5 00:00:16.600 --> 00:00:20.750 collides with cold air moving down from Canada, resulting in snow and rain. 6 00:00:20.770 --> 00:00:24.890 The Global Precipitation Measurement (GPM) mission observed the storm, which dumped 7 00:00:24.910 --> 00:00:28.980 8 - 14 inches of snow over southern Maine and New Hampshire. 8 00:00:29.000 --> 00:00:33.080 9 00:00:33.100 --> 00:00:37.160 GPM's radar detected the storm's front as a deep layer of rain that abruptly ended south of 10 00:00:37.180 --> 00:00:41.180 Cape Cod. 11 00:00:41.200 --> 00:00:45.310 This suggested a strong temperature gradient in the lower atmosphere, 12 00:00:45.330 --> 00:00:49.460 This suggested a strong temperature gradient in the lower atmosphere, 13 00:00:49.480 --> 00:00:53.640 14 00:00:53.660 --> 00:00:57.840 which is a key ingredient for strengthening the storm. 15 00:00:57.860 --> 00:01:01.910 16 00:01:01.930 --> 00:01:04.013