This visualization starts over the United States as the viewer watches a weather event form over the east coast. We then freeze on April 1, 2017 as GPM flies overhead collecting data over this weather system. Zooming down to the Northeast, GPM's DPR (3D volumetric precipitation data) is slowly cut away to reveal the inner precipitation structure of the snow storm. Looking closely, one can see a thin band of liquid precipitation that formed in the northern section of the storm eventually tapering into frozen precipitation in the far north. The visualization wraps with the camera pulling back to a bird's eye view of the snow storm.
NASA's Global Precipitation Measurement mission or GPM core observatory satellite flew over the United States northeast coast during a snow storm on April 1, 2017. This snow storm delivered up to 18 inches of snow in some parts of New England.
The GPM Core Observatory carries two instruments that show the location and intensity of rain and snow, which defines a crucial part of the storm structure – and how it will behave. The GPM Microwave Imager sees through the tops of clouds to observe how much and where precipitation occurs, and the Dual-frequency Precipitation Radar observes precise details of precipitation in 3-dimensions.
GPM data is part of the toolbox of satellite data used by forecasters and scientists to understand how storms behave. GPM is a joint mission between NASA and the Japan Aerospace Exploration Agency. Current and future data sets are available with free registration to users from NASA Goddard's Precipitation Processing Center website.
GCMD keywords can be found on the Internet with the following citation:
Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 184.108.40.206.0